updated text_date
updated README
Fixed add_linguistic_processor when there is no header in the input file
Included functions to create tokens and terms (for SemCor -> NAF converter)
Small bug
Included get_reftype
Included docstring and documentation for all the modules
README updated
updated docstring for feature_extractor
Included add_reference to the main parser and fixed problem with adding references to KAF files
Updated SRL for adding external references (and nested)
Merge github.com:cltl/KafNafParserPy
Make my branche up-to-date