Add institution-based login and separation of loans from different institutions
Fix DB migration for sqlite tests

- loans.as_guest shouldn't have a default value and shouldn't be null, so it doesn't really make sense to add it in a later migration step.
- Add default for things.disabled.
Remove loans.object_type property not in use
Re-add users route that was mistakenly removed in d8377cd1e2aa8f
Fix tests
Merge branch 'master' of github.com:danmichaelo/bibrex

Conflicts:
	app/controllers/LoansController.php
	app/database/migrations/2013_08_08_173247_create_loans_table.php
	app/database/migrations/2013_08_30_233024_add_as_guest.php
	app/database/migrations/2013_09_08_211826_add_disabled_thing.php
	app/tests/UserTest.php
	app/views/users/index.blade.php
Remove guest_ltid from global config file as it is now set per library in the database