Removed column 'datetime' from issue.
Merge branch 'master' into create-issue
Merge branch 'fix-event' into create-issue

Conflicts:
	app/controllers/issues_controller.rb
	db/schema.rb
	kuansim-frontend
Added issue create, update, delete.
added several migrations
Merged origin into local create-issue branch.
Merge remote-tracking branch 'origin/create-issue'

Conflicts:
	app/controllers/issues_controller.rb
	db/schema.rb