Compatibility fixes for Windows, and for users with pyfits/pywcs instead of astropy
Updated installation docs
Windows installation creates .bat file. Documentation updated
Refactor Qt imports to glue.external.qt
PySide Compatibility
Updated dependency information for setup scripts and documentation
Avoid new py.test API feature
Fix PySide segfault
Merge pull request #144 from glue-viz/staging

Merge windows compatibility code
Merge with master
Merge pull request #140 from glue-viz/pyside_compat

PySide support