simplified WordGrammarDebugger

Change-Id: Iebf284500e77e099a16d5971bbb7a857a66e2ae1
refactored parser trace classes

Change-Id: Ib2e0f2131abd5fac94b0a00d1513de84cf0ce101
removed ParserEngine folder

Change-Id: I7b115ebdec5a7753d70108d75938193f94323e37