added 'status' field to task
fixed organization page in admin section
renamed task's STATUSES to STATES
fixed deadline rendering
moved into partial task prizes
added publish route, action and method
modified abilities
added 'published' scope
views changed
removed status field
added 'unpublished' state
removed redundant code
fixed events rendering
fixed task's deadline rendering
some changes in tasks views
changed abilities
Merge pull request #21 from progress-engine/i223-task-preview

Task preview