Moves activity provider to separate files
Unifies event filling
Prevents calls to not defined methods
Unifies project definition
Improves method complexity
Unifies activity journal projection
Fixes wiki activity provider
Fixes test unit tests
Adds I18n dependency to base class
Fixes changeset activity provider
Fixes source code layout
Fixes work package activity link with anchor
Passes activity to activity providers
Fixes time entry and news activity provider
Passes activity to activitied type
Adds changelog entry