Added TrieSpellChecker.java (from TrieSpellChecker repo) & america-english (dictionary)
Update: Spell checking (text segmentation essentially) performed via TrieSpellChecker.java class (the Google spell checker API was discontinued in July 2013)
Updated ExecuteProcessing.java & TextFilesGenerator.java: Text segmentation is performed when building the text files.
Update .gitignore
Merge branch 'spell-cheking' into develop
Update config.properties