* removed isPunctiationPartOfWords hack and created a new contraction input method that allows typing just anything, instead of predefined list coming from the dictionary
* updated the common compound words and contractions in Bulgarian, Dutch, English and French
* removed some non-sense and rarely used English words
* fixed crashing when trying to find words with apostrophes in the database
* fixed a crash when trying to capitalize single character strings
* improved dictionary validation at build time: spaces are now disallowed
* the dictionary loader now supports word frequencies
* word frequency validation upon building
* added default word frequencies to all dictionaries
* updated documentation
