Build scripts cleanup and dictionary loading optimization

* moved the source languages out of assets/ into their own directory (#356)
  
  * split build.gradle into several smaller files

  * improved word frequency validation during build time

  * slightly optimized dictionary loading speed using pre-calculated file size

  * fixed a potential crash when loading invalid assets

  * fixed dictionary loading progress starting at 100% then jumping to 0% when manually loading two dictionaries one after another

  * documentation update

languages/definitions/BrazilianPortuguese.yml

@@ -0,0 +1,15 @@
+---
+locale: pt-BR
+dictionaryFile: pt-BR-utf8.csv
+name: Português brasileiro
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [a, b, c, ç, á, â, ã, à] # 2
+  - [d, e, f, é, ê, è] # 3
+  - [g, h, i, í] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ó, ô, õ] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v, ú] # 8
+  - [w, x, y, z] # 9

languages/definitions/Bulgarian.yml

@@ -0,0 +1,14 @@
+---
+locale: bg-BG
+dictionaryFile: bg-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_DE] # 1
+  - [а, б, в, г] # 2
+  - [д, е, ж, з] # 3
+  - [и, й, к, л, ѝ] # 4
+  - [м, н, о, п] # 5
+  - [р, с, т, у] # 6
+  - [ф, х, ц, ч] # 7
+  - [ш, щ, ъ, ь] # 8
+  - [ю, я] # 9

languages/definitions/Danish.yml

@@ -0,0 +1,14 @@
+---
+locale: da-DK
+dictionaryFile: da-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR] # 1
+  - [a, b, c, æ, å] # 2
+  - [d, e, f, é] # 3
+  - [g, h, i] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ø] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v] # 8
+  - [w, x, y, z] # 9

languages/definitions/Dutch.yml

@@ -0,0 +1,14 @@
+---
+locale: nl-NL
+dictionaryFile: nl-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [a, b, c, à, ä, ç] # 2
+  - [d, e, f, é, è, ê, ë] # 3
+  - [g, h, i, î, ï] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ö] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v, û, ü] # 8
+  - [w, x, y, z] # 9

languages/definitions/English.yml

@@ -0,0 +1,14 @@
+---
+locale: en
+dictionaryFile: en-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [a, b, c] # 2
+  - [d, e, f] # 3
+  - [g, h, i] # 4
+  - [j, k, l] # 5
+  - [m, n, o] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v] # 8
+  - [w, x, y, z] # 9

languages/definitions/Finnish.yml

@@ -0,0 +1,14 @@
+---
+locale: fi-FI
+dictionaryFile: fi-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [a, b, c, ä, å] # 2
+  - [d, e, f] # 3
+  - [g, h, i] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ö] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v] # 8
+  - [w, x, y, z] # 9

languages/definitions/French.yml

@@ -0,0 +1,14 @@
+---
+locale: fr
+dictionaryFile: fr-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR] # 1
+  - [a, b, c, à, â, æ, ç] # 2
+  - [d, e, f, é, è, ê, ë] # 3
+  - [g, h, i, î, ï] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ô, œ] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v, ù, û, ü] # 8
+  - [w, x, y, z, ÿ] # 9

languages/definitions/German.yml

@@ -0,0 +1,14 @@
+---
+locale: de
+dictionaryFile: de-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_DE] # 1
+  - [a, b, c, ä] # 2
+  - [d, e, f] # 3
+  - [g, h, i] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ö] # 6
+  - [p, q, r, s, ß] # 7
+  - [t, u, v, ü] # 8
+  - [w, x, y, z] # 9

languages/definitions/Greek.yml

@@ -0,0 +1,14 @@
+---
+locale: el-GR
+dictionaryFile: gr-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR] # 1
+  - [α, β, γ, ά] # 2
+  - [δ, ε, ζ, έ] # 3
+  - [η, θ, ι, ή, ί, ϊ, ΐ] # 4
+  - [κ, λ, μ] # 5
+  - [ν, ξ, ο, ό] # 6
+  - [π, ρ, σ, ς] # 7
+  - [τ, υ, φ, ύ, ϋ, ΰ] # 8
+  - [χ, ψ, ω, ώ] # 9

languages/definitions/Hebrew.yml

@@ -0,0 +1,16 @@
+---
+locale: iw-IL
+dictionaryFile: he-utf8.csv
+abcString: אבג
+hasUpperCase: no
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [ד, ה, ו] # 2
+  - [א, ב, ג] # 3
+  - [מ, ם, נ, ן] # 4
+  - [י, כ, ך, ל] # 5
+  - [ז, ח, ט] # 6
+  - [ר, ש, ת] # 7
+  - [צ, ץ, ק] # 8
+  - [ס, ע, פ, ף] # 9

languages/definitions/Indonesian.yml

@@ -0,0 +1,15 @@
+---
+locale: in-ID
+dictionaryFile: id-utf8.csv
+name: Bahasa Indonesia
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [a, b, c] # 2
+  - [d, e, f] # 3
+  - [g, h, i] # 4
+  - [j, k, l] # 5
+  - [m, n, o] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v] # 8
+  - [w, x, y, z] # 9

languages/definitions/Italian.yml

@@ -0,0 +1,14 @@
+---
+locale: it
+dictionaryFile: it-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [a, b, c, à] # 2
+  - [d, e, f, é, è] # 3
+  - [g, h, i, ì, í, î] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ò, ó] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v, ù, ú] # 8
+  - [w, x, y, z] # 9

languages/definitions/Norwegian.yml

@@ -0,0 +1,14 @@
+---
+locale: nb-NO
+dictionaryFile: nb-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR] # 1
+  - [a, b, c, æ, å] # 2
+  - [d, e, f, é, è] # 3
+  - [g, h, i] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ø, ó, ò, ô] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v, ü] # 8
+  - [w, x, y, z] # 9

languages/definitions/Polish.yml

@@ -0,0 +1,14 @@
+---
+locale: pl-PL
+dictionaryFile: pl-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_DE] # 1
+  - [a, b, c, ą, ć] # 2
+  - [d, e, f, ę] # 3
+  - [g, h, i] # 4
+  - [j, k, l, ł] # 5
+  - [m, n, o, ó, ń] # 6
+  - [p, q, r, s, ś] # 7
+  - [t, u, v] # 8
+  - [w, x, y, z, ź, ż] # 9

languages/definitions/Romanian.yml

@@ -0,0 +1,14 @@
+---
+locale: ro-RO
+dictionaryFile: ro-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR] # 1
+  - [a, b, c, ă, â, á] # 2
+  - [d, e, f, é, è] # 3
+  - [g, h, i, î] # 4
+  - [j, k, l] # 5
+  - [m, n, o] # 6
+  - [p, q, r, s, ș] # 7
+  - [t, u, v, ț] # 8
+  - [w, x, y, z] # 9

languages/definitions/Russian.yml

@@ -0,0 +1,14 @@
+---
+locale: ru-RU
+dictionaryFile: ru-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR] # 1
+  - [а, б, в, г] # 2
+  - [д, е, ё, ж, з] # 3
+  - [и, й, к, л] # 4
+  - [м, н, о, п] # 5
+  - [р, с, т, у] # 6
+  - [ф, х, ц, ч] # 7
+  - [ш, щ, ъ, ы] # 8
+  - [ь, э, ю, я] # 9

languages/definitions/Spanish.yml

@@ -0,0 +1,14 @@
+---
+locale: es-ES
+dictionaryFile: es-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR, ¡, ¿] # 1
+  - [a, b, c, á] # 2
+  - [d, e, f, é] # 3
+  - [g, h, i, í] # 4
+  - [j, k, l] # 5
+  - [m, n, ñ, o, ó] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v, ú, ü] # 8
+  - [w, x, y, z] # 9

languages/definitions/Swedish.yml

@@ -0,0 +1,14 @@
+---
+locale: sv-SE
+dictionaryFile: sv-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [a, b, c, å, ä] # 2
+  - [d, e, f, é] # 3
+  - [g, h, i] # 4
+  - [j, k, l] # 5
+  - [m, n, o, ö] # 6
+  - [p, q, r, s] # 7
+  - [t, u, v] # 8
+  - [w, x, y, z] # 9

languages/definitions/Ukrainian.yml

@@ -0,0 +1,14 @@
+---
+locale: uk-UA
+dictionaryFile: uk-utf8.csv
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION_FR] # 1
+  - [а, б, в, г, ґ] # 2
+  - [д, е, є, ж, з] # 3
+  - [и, і, ї, й, к, л] # 4
+  - [м, н, о, п] # 5
+  - [р, с, т, у] # 6
+  - [ф, х, ц, ч] # 7
+  - [ш, щ] # 8
+  - [ь, ю, я] # 9

languages/definitions/Yiddish.yml

@@ -0,0 +1,16 @@
+---
+locale: ji-JI
+dictionaryFile: ji-utf8.csv
+abcString: אבג
+hasUpperCase: no
+layout:
+  - [SPECIAL] # 0
+  - [PUNCTUATION] # 1
+  - [ד, ה, ו] # 2
+  - [א, ב, ג] # 3
+  - [מ, ם, נ, ן] # 4
+  - [י, כ, ך, ל] # 5
+  - [ז, ח, ט] # 6
+  - [ר, ש, ת] # 7
+  - [צ, ץ, ק] # 8
+  - [ס, ע, פ, ף] # 9