A minimal set of tests for colormapped scatterplots.
Custom marker renderer fails, and fixing is non-trivial.
Remove save commands.
Replace @expectedFailure with @SkipTest because Python 2.6
@skip, not @SkipTest... *sigh*
Unittest2 to the rescue
Just skip the test - can't work out why it's failing.
Referencing the ticket in the skipped test.
Replaced comments by docstrings.
Added a line in CHANGES.txt
Merge pull request #231 from enthought/tests/colormapped-scatterplot

Tests for colormapped scatterplots.