implements #53. autoExpand now takes 'both', 'left', 'right', or 'none' as possible values while still supporting the older true/false values.
Added events for onTaskMoveStart, onTaskMoveEnd, onTaskResizeStart, and onTaskResizeEnd. Also added an editing state object that keeps track of the number of tasks that are being moved or resized (which should be one...but I left it open in case we eventually allow multiselection of tasks or if somehow things get buggy with the mouse).
properly added events for onTaskMoveStart, onTaskMoveEnd, onTaskResizeStart, and onTaskResizeEnd events
Renamed onTaskMoveStart and onTaskResizeStart to onTaskMoveBegin/onTaskResizeBegin because of the 1`-start` Angular attribute bug.
Merge branch 'feature/pull-request-57' into develop
Added missing internal row dbl click event handler