tests for qtutil
PEP8
Merge pull request #177 from glue-viz/staging

Updates to data factories
Merge pull request #178 from glue-viz/coverage

Coverage
Bugfix. Save subset now works. Closes #180
Merge pull request #184 from glue-viz/save

Bugfix. Save subset now works. Closes #180
Make automatic data loader selection more flexible. Closes #185
minor cleanup
Updated docs
has_extension public
Deal with old qt versions
ENH: Ability to load multiple files at once. Closes #187
TRAVIS install h5py with apt-get
Merge pull request #186 from glue-viz/factories

Enhancements to data loading:

* Fits catalogs should be dispatched to the catalog loader (not the image loader) by default
* The load data dialog can open multiple files at once
Improved handling of numeric coercion

Missing entries in catalogs are no converted to nan
Prevent errors with spaces in catalog entries (noted in #179)
Prevent overly long error dialogs.

Closes #179
PEP8
Merge pull request #188 from glue-viz/dtypes

Better handling of numeric conversion
Remove unused code
Get rid of conftest.py, which messes up coverage reports