Refactored uuid field to a UUIDModel mixin
Refactored actuals and budgets properties
Added translations for Actuals and ActualItems
Changed BudgetTemplateNode.items to budget_items and actual_items
Fixed import of UUIDModel
Reverted change to model mixins inheritance
Interactions app for comments, stars and follows. WIP. Some other cleanup along the way.
Fixed some broken merge stuff
Merge branch 'develop' of https://github.com/prjts/open-muni into develop

Conflicts:
	omuni/accounts/models.py
	omuni/commons/mixins/models.py
More enhancements for comments.
Merge remote-tracking branch 'origin/develop' into develop