Check that the path is not empty before calling CGContextClosePath or CGContextClip
Fix test of points-to-pixel conversion.

The conversion factors for points to pixels has been 1 for a very long time,
but the test assumed something other factor.
Fix the testURLFallback test failure.
Merge pull request #69 from WarrenWeckesser/quartz-empty-path

Quartz backend: Don't call CGContextClosePath or CGContextClip with an empty path
Merge pull request #86 from enthought/test/fix-unit-conversion-test

Fix test of points-to-pixel conversion.
Be more specific about the exception type from parsing a brush URL
Merge remote-tracking branch 'origin/test/fix-unit-conversion-test' into test/fix-svg-url-fallback
Merge pull request #87 from enthought/test/fix-svg-url-fallback

Fix the testURLFallback test failure.
REL: Update version for 4.3.0 release.
Image backend now properly passes along alpha channel.
Merge pull request #102 from brett-patterson/master

Transparency bug with image backend
add a test assistant for enable interactors
update drag_tool_test_case to use the EnableTestAssistant
Update testing.py

rename create_a_mock_window -> create_mock_window
Merge pull request #106 from enthought/feature-enable-test-assistant

Feature enable test assistant
Modified draw_image to work around memory leak in QPainter.device().

Instead of calling QPainter.device() to check that the painter is active
and to get the device, the kiva.qpainter.GraphicsContext qt_dc member is
checked to see that it is an instance of QPixmap. To check that the
painter is active, QPainter.isActive() is called on
kiva.qpainter.GraphicsContext.gc . This has been tested with
qt_example.py  in the Chaco demos by setting: ETSConfig.toolkit =
"qt4.qpainter" .
Where there was once a memory leak, it now appears that there is none.
Merge pull request #107 from jilott/fix/kiva-qpainter-backend-memory-leak

Modified draw_image to work around memory leak in QPainter.device().
Add Travis CI config files.
Explicitly install PIL
Add pyparsing to the installed packages and install Qt for 2.6 as well