Cleanup
Deal with new astropy IO identifier
Fix README link
Fix travis build trigger test
Update for matplotlib API change
Slightly more robust handling of dependent_axes
Merge pull request #207 from glue-viz/staging

Cleanup
Support for ND images
CASA Image loader
Reposition ND slider
Merge pull request #206 from glue-viz/nd_image

ND Image Support
Fix #208. Prevent error message if histogramming NaNs
Merge pull request #210 from glue-viz/staging

Fix #208. Prevent error message if histogramming NaNs
Simple fix and associated test for #215
Merge branch 'master' into fix-data-get_component-None
Merge pull request #216 from JudoWill/fix-data-get_component-None

Fix for #215
Merge branch 'master' into clean-categorical-component
rolled back the auto-conversion to `CategoricalComponent` now that I have a better way to do it.