Adds autosum of points for columns in Sprint Board

Change-Id: Ia912abc39208545a8f3c9cc13d95460081f27fae
new SprintBoardTaskEdit Controller

handles problem with ManiphestTaskEdit not instantiating a SprintCard
uses route /sprint/board/task/edit

Change-Id: I3540e185461e8fca5346a2a23ded323d9ff6e299
change stats logic

Change-Id: I2a7e3e8f583e6814e0d59c3bd506f4d7bd110fd0
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/view/TasksTableView.php