GL: fix zoom with no area + rename event handler
Implement a default handling of active image colormap.
Correct typo.
Proper alpha setting.
Accept unsigned bytes as curve colors.
Close to operational.
Clear the images prior to switch to scatter plot view.
GL: Moving PyOpenGL to a gl submodule
Add TaurusPlugin1D.py as an optional plugin.
Threshold based selections implemented.
Possibility to set default colormap index.
Operational.
Change types to match GL API
Merge remote-tracking branch 'upstream/master'