New Cucumber tests for tagging feature

Cucumber tests for the tagging feature on application.
Updated search controller to use where clause.

Where used instead of find so that paginate doesn't have to paginate
through an array and load stuff into memory.
Cleaning up views for bills and legislators

Views have been cleaned up for bills and legislators and they now
utilize renderings via collections. Headers have also been parted out to
their own file.
Updating tagging cukes

Logging in is a background item for the tagging cukes. Also removed the
scenario for not being locked in. Will most likely move to another
feature set.
Tag button has been added

Buttons to follow a bill, or legislator for updates added.