factoring out the extra callbacks
Added a test to make sure the tick locators are always correct
refactor the tests to be a little cleaner
refactored the tick updating to use matplotlib.ticker instances
back to zero-based!
refactoring and bug-squashing
more bug squashing
refactored pandas to be within the Excel reader. data_factories imports properly with or without pandas installed
for the panda tests
converting to np.testing.assert_equal instead of assert np.all
more np.testing refactoring
refactored to use np.searchsorted
made the categorical testing more difficult to deal with some edge cases
screwed up that test, correct now
updated the docstring to indicate that the uniform-jitter works
raises ValueError on a bad jitter method
fixed stupid mistake