Added Building, Floor, Zone to model; created custom data migration script to associate Zones with Locations. Partway to fixing #159.
Rework of views.py to use new model. Some tweaks to admin as well.
Added support for /offline .  Fixes #175.
Continued progress on #159. Rewrote views.offline to use new model.
Eliminated hard-coding of building names; now data-driven
Modified to use data-driven (non-hard-coded) url patterns
Refactored floor and location views to remove dependency on hard-coded building names.  Also fixes #175 - adds offline view across buildings.
Added tastypie api fields for location building, floor, zone names; added tastypie api field for session duration.
Added display of location duration, and verbose session_type
Removed location.building and location.floor, and dependencies. Fixes #159.
modified "location" url for consistency. was: /location/gelman/e-001 is: /gelman/location/e-001
Updated to new location url schema
Removed extraneous $ in floors url (not sure how that got in there
Hide zones with no computers whatsoever
Added creation of GW Libraries buildings, floors, zones prior to migration of existing Locations
Removed print statement that was there for development purposes only
GRC is on the 7th floor, not the 6th
Merge pull request #183 from gwu-libraries/t159_floor

T159 floor