Webviewer uses shift+alt to rotate about X and Y axis.
Added constants for modifier keys.
fixing packaging problem with slickgrid images.
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into dev
"updating releaseinfo files for release 0.6.2"
Merge remote-tracking branch 'upstream/dev' into P48684101

"Merging dev into P48684101"
Merge pull request #1353 from crobinsonut/P48684101

Alt+Shift+Left Click to Rotate
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into release_0.6.2
Zooming is now controlled with mouse wheel.
Removed whitespace.
Merge pull request #1354 from crobinsonut/P48683983

Scrolling to Zoom
Uncommented dragging (translating). Removed old code for zooming.
Merge pull request #1355 from crobinsonut/P48683983

Fixed Dragging
Fix a drag-n-drop bug.
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into bug
Merge pull request #1356 from setowns1/bug

Fixed drag-n-drop bug
making libpath scanning faster
Merge branch 'libpath' of github.com:naylor-b/OpenMDAO-Framework into libpath
small fix
removed unused import