Added panel:cursorupdate event
Added utilities to prevent memory leaks in event propagation.
Merge pull request #143 from tsherif/event-cleanup

Added utilities to prevent memory leaks in event propagation. Closes #139.
Dirty check panel.cursor in panel.draw
Merge pull request #142 from PaulMougel/event-cursorupdate

Added panel:cursorupdate event
Minor code cleanup.
Merge pull request #145 from tsherif/cleanup

Minor code cleanup.
Reworked panel API
Further cleanup of the Volume Viewer panel API
Linted.
Merge pull request #146 from tsherif/panel-API

Panel api
Cleaned up panel size updates.
Merge pull request #147 from tsherif/panel-size

Cleaned up panel size updates.
Moved panel resize logic into panel.
Merge pull request #148 from tsherif/panel-resize

Moved panel resize logic into panel.
Updated panel documentation.
Merge pull request #149 from tsherif/panel-doc

Updated panel documentation.
Linted
Merge pull request #150 from tsherif/linted

Linted
Pulled flipImage out of nearestNeighbour. Closes #132