more histogram tests
popup message on script error. Closes #131
Better MIME handling of data layers. Closes #130
PEP8
more conservative histogram updates
bugfix introduced in 912f9b1a3199f14b673b5b5076b635c943ec06d4 - DND with RGB editor works again
more doc tweaks
Turn of matplotlib interactive mode. prevents popup window on new client creation
Merge branch 'master' into staging
ROI mouse modes require drags to kick in. Prevents single click+release from redefining subset
refactored ROI code. Added click roi mode, and poly/lasso modes
updated mouse_mode documentation
More prominent zoom box in MPL FigureCanvas
Viewer dashboards don't disappear when Glue window loses focus
more descriptive __str__ and __repr__ methods
discard user rcParams file to standardize MPL
Data factories can return lists of data objects
Fix wcs calculation offset. Ability to create coordinates directly from WCS
more histogram tests
popup message on script error. Closes #131