Fix browser autofill event problem with angular.

Removing usage of angular databinding and use standard
jquery like access to dom values.
Merge pull request #94 from taigaio/autocomplete-bug

Fix browser autofill event problem with angular.
Fix Bug #1279: Deleting block condition from task in taskboard does not restore color
Remove now unnecesary tg-analytics tag from main template.
Add analytics service and some additional tracking events.