Added variables for google analytics. REOL-44
Added google analytics module. REOL-44
Enable google analytics module. REOL-44
Merge pull request #46 from eReolen/feature/google_analytics

Feature/google analytics
Added basic function for supporting error handling in modals for loan, reservation and bookmark. REOL-121
Added argument to set popup id. REOL-121
Implemented using the new function in reol_base. REOL-121
Reimplemented a lot of code, to allow prettier errors. REOL-121
Fixed issue from scrutinizer. REOL-121
Fixed isseue from scrut. REOL-121
Loaning when not logged in should trigger auth dialog. REOL-121
Changed admin form to support customizing the error messages. REOL-121
Changed to have exception contain whether or not to show buttons. REOL-121
Added code for handling exception from Publizon. Added code for creating an entity button. REOL-121
Depend on modules i call. REOL-121
Use new function for creating buttons. REOL-121
Use new function for creating buttons. Created functions for getting bookmark and reserve button. REOL-121
Implemented sane default for error messages. REOL-121