Fixes #238 - Missing else
Fix drop down empty arrays being treated as nothing, add advanced callable array to get options from model
Fix logic flaws
Allows empty dropdown arrays
Fixes an issue where success is still called when AJAX validation fails
URL Slug format method changed for language spesific chars with django's method.
Datepicker right-alignment problem.
Merge pull request #247 from chesterx/master

Better url slugify method / Datepicker right alignment problem
Adds transliteration for slugs in JS
Removing plugins can now be purged from the db, orphaned plugins are visible, don't concat single list relations, add more events to Cms controller.
Can now remove, refresh and disable plugins via the Back-end GUI
Fixes #234 - [Suggestion] Increase width of "ocPopover" panel to 400px