added directive for collections
using datum field edit view in angular core
adding copy of datum_field_settings_edit_embedded.handlebars back in backubne client
for #1777 basing collections view on datalist view
added tests and implementation for angular datum field display
can use the collection to display corpus fields in the spreadsheet app for #1777
jshint
dont need docs on collection
Dont need corpus on collection
moving contextualize to the angular core controller
removing old fields list