Add remove checklist item WIP
Add empty image to satisfy lame glyphicons error
Use poltergeist for headless browser testing

I'm using poltergest instead of selenium because it will play nicely with more
of our tools. Most importantly the CI server.  You're going to need phantomjs installed
if you incorporate this commit.  You can do that on your Mac using homebrew:

    brew install phantomjs

For other environments check out the docs:
https://github.com/jonleighton/poltergeist
Add tested remove checklist items
Remove empty glyphicons files
Add glyphicons
Merge branch 'remove-checklist-item'