CHIDLES script errors fixed, lots of comments
CHIDLES script errors fixed, lots of comments

I've commented most of the script in order to understand what it was
doing in relation to the rest of the corpus and the CHAT manual.

Some of the errors fixed were
 - Adding extra fusional/suffix pairs to recognize new verb PoS tags
 - New non-standard annotation tiers like xgra and xpho

jayelm/chatparse