Move web viewer to own repository

https://github.com/joelkuiper/spa
Merge branch 'master' of github.com:ijmarshall/cochrane-nlp

* 'master' of github.com:ijmarshall/cochrane-nlp:
  eesh more work on adding option to cap the number of features -- still needs a sanity check
  adding option to cap the number of features -- this needs a sanity check
  working multitask joint model
  non functioning Multitask Hybrid model
  swapped back positive and negative colours

Conflicts:
	web/static/css/annotations.css