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
Merge pull request #151 from tsherif/flip-image

Pulled flipImage out of nearestNeighbour. Closes #132
Wireframe on demand.
The other files.
Merge pull request #154 from tsherif/wireframe

Wireframe
Fixed active panel bug. Fixes #153.
Merge pull request #155 from tsherif/active-panel

Fixed active panel bug. Fixes #153.