first commit
Merge branch 'master' of https://github.com/ndlib/honeycomb

Conflicts:
	.gitignore
First commit of CAS authentication.

* Added Devise, CAS, and ldap related gems.
* Created User model, controller, migration.
* Added Devise route for Users.
* Updated autoload_paths in application.rb to find stuff in
  models/active_record folder.
* Set CAS related paths to config in development.rb

Does not complete DEC-20, but starts work on it.

dec-20#