Adds flat-ui and bootstrap to project.

Removes bootstrap-rails gem as it was causing issues with flat-ui's bootstrap.
Added customized CSS for the flat UI kit
Integrate CSS
require vendor dir before other styles
Adds description fields to Task
Merges master. Fixes merge conflicts
Adds description fields to Task
Adds first pass at viewing mode/adding description
toggleProperty is deprecated
Updates comments to open/close with subtask

Also adds the showingAllComments state so it shows only the first 3 until the user clicks
show all comments. Fixes #45
Attempt to resolve conflicts
Edit required tasks
Revert d6e0bb0..5ce628f

This rolls back to commit d6e0bb03ec6ca6c2925be1d5ff636ff9f18ec62e.
Added new typography styles
Changed sidebar styling
Updated navigation & typography CSS
Task edits to css
Starts completed limbo feature
Sidebar CSS changes: Group members & News feed
Update navigation, typography, and sidebar css

Conflicts:
app/assets/javascripts/templates/groupMembers.handlebars
app/assets/javascripts/templates/newsItem.handlebars