Fixed unicode issue in distutils setup.py

	modified:   setup.py

- Now works under python 2 or 3
Misc fixes to run under Python 3

	modified:   ginga/AutoCuts.py
	modified:   ginga/Catalog.py
	modified:   ginga/Control.py
	modified:   ginga/PythonImage.py
	modified:   ginga/RGBMap.py
	modified:   ginga/cmap.py
	modified:   ginga/gtkw/FitsImageGtk.py
	modified:   ginga/gtkw/plugins/Info.py
	modified:   ginga/gtkw/plugins/PixTable.py
	modified:   ginga/gtkw/plugins/Thumbs.py
	modified:   ginga/imap.py
	modified:   ginga/iqcalc.py
	modified:   ginga/misc/Datasrc.py
	modified:   ginga/misc/Settings.py
	modified:   ginga/qtw/FitsImageQt.py
	modified:   ginga/qtw/QtHelp.py
	modified:   ginga/qtw/plugins/Catalogs.py
	modified:   ginga/qtw/plugins/Contents.py
	modified:   ginga/qtw/plugins/FBrowser.py
	modified:   ginga/qtw/plugins/Info.py
	modified:   ginga/qtw/plugins/PixTable.py
	modified:   ginga/qtw/plugins/Thumbs.py

- fixes to various plugins and modules to run correctly under python 3
Bug fixes for Thumbs and Preferences plugins

	modified:   ginga/gtkw/plugins/Preferences.py
	modified:   ginga/gtkw/plugins/Thumbs.py
	modified:   ginga/qtw/plugins/Preferences.py
	modified:   ginga/qtw/plugins/Thumbs.py

- added "Auto scroll" checkbox to the bottom of the Thumbs plugin gui
  - if checked thumbs window will scroll when new images arrive
  - this can be set by a preference in plugin_Thumbs: "autoScroll: False"
  - default is True
- fixed an issue where the thumbnail was not auto cut
- fixed a bug in the Preferences gui where the auto cuts method widget was
    not updated correctly
Modified to use astropy module if it is installed

	modified:   ginga/AstroImage.py
	modified:   ginga/gtkw/plugins/FBrowser.py
	modified:   ginga/gtkw/plugins/MultiDim.py
	modified:   ginga/qtw/plugins/FBrowser.py
	modified:   ginga/qtw/plugins/MultiDim.py
	modified:   ginga/wcs.py
	modified:   scripts/example1_gtk.py
	modified:   scripts/example1_qt.py
	modified:   scripts/example2_gtk.py
	modified:   scripts/example2_qt.py

- otherwise falls back to individual pyfits and pywcs modules
Bug fix to disable Pick plugin if scipy is not installed

	modified:   ginga/gtkw/plugins/Pick.py
	modified:   ginga/iqcalc.py
	modified:   ginga/qtw/plugins/Pick.py

- Ginga will still start ok if scipy is not installed
  - Pick plugin will be missing
Add .gitignore
Add .travis.yml