Add underscore.js

I'm addicted to this library
Standardize CSS annotations
I really like Banyan 

... I'll write my own interval / segment tree soon
otherwise my CS training gets itchy
text_layer_builder filters on whitespace. 

Lame
Merge branch 'master' of github.com:ijmarshall/cochrane-nlp

* 'master' of github.com:ijmarshall/cochrane-nlp:
  pushing test documents
  merging

Conflicts:
	web/abstract_pipeline.py
Import logger
UTF-8 conversion for strings