Added preliminary scheduler to calendar.
Fixed bugs in scheduler.
Major fixes to tree view such as hashing.
Updated log and targets with joined columns.
Updated scheduler with late items executed first.
Refined completed target display in calendar.
Calendar now updates with each refresh.
Commented call to update started tasks.
Fixed tree view breaking on deletions.
Updated recurrence break for tasks.
Added button to break recurring task targets.
Added break button functionality for recurrences.
Bug fixes for continuing recurrance breaks.
Fixed bugs in task recurrance break.
Fixed date variable in recurrance break.