Fix approach used for interval cancellation associated with resource leak closing for WTD-717; this avoids the exception observed in WTD-750.
Add tests to verify that directives stop polling after their scope is destroyed (to prevent resource leaks); those changes address resource leaks identified in the context of WTD-717.
Complete specs for transitioned plot view, WTD-533.
Add skeleton specs for remaining plot scripts. WTD-533.
