Switched to custom bootstrap

Switched to a customized version of bootstrap that uses a custom brand
color. The custom brand color in this case is Temple University's cherry
red.
Login page displays username and password fields

Added a panel to the login page that displays username and password
fields. There is also a 'Forgot password' link within the same panel that
will open 'accounts.temple.edu' in a new tab.
Login page logo

The login page now has a Temple University logo.
Login role chooser

When a user logs into the system, they can be presented with a role
picker to choose what role they want to login under.
Closes #3.
TU logo in header

The header now contains the Temple University logo on top.
Header tab bar changes based on page name

The tabs available in the header's tab bar change based on the name of the
current page.
User control drop down

The header of every page now has a dropdown from which the user can either
switch roles, or logout.
Merge pull request #17 from tehcurrent/master

Closes #10
Closes #11
Closes #12