Update TODO
Symlink bower_components into Yesod static path
Install ng-group via bower and vendorise...

Also installs a version of angular we can't use.  We depend on v1.1.5,
which never had a Bower release, so we can't constrain it in our own
bower.json.  So we just vendorise it to stop git complaining, and ignore
it.
Use bowerised ng-group instead of homegrown