Merge pull request #16 from philip30/master

PINC
Fixed error in preprocessing
Removed generic string
Fixed preprocessing
Added a tokenizer
Added test for the Penn Tokenizer
Merge branch 'master' of github.com:neubig/travatar
Made the tokenizer executable
Fixed unknown in FSM, supporting multiple head symbols + Removed default symbol options
Fix some trace out messsage to include source in lookuptable fsm
Included save_src_str config into lookuptable-fsm