added make.bat file
Merge pull request #40 from anizami/add-make.bat

Added make.bat file
Make use of astropy affiliated package infrastructure
Don’t test Python 3.2
Enable coveralls
Merge pull request #42 from astrofrog/use-astropy-helpers

Make use of astropy affiliated package infrastructure
added tests for image comparison
Merge pull request #41 from anizami/new-image-tests

code for generating and comparing images
Make coord_type_from_ctype return a default coord_wrap
Add coord_type_from_ctype tests.
Merge pull request #19 from Cadair/coord_wrap

Make coord_type_from_ctype return a default coord_wrap
Inherit default grid style from matplotlib.rcParams

Based on `matplotlib.axis.YTick._get_gridline`. Note that Matplotlib
implements gridlines with `Line2D`, whereas wcsaxes implements gridlines
with `PathPatch`. The two have slightly different option styles
regarding dashes, so we have to map between them.
Inherit default tick style from `matplotlib.rcParams`

Note that Matplotlib's defaults dictionary contains default settings
only for `xtick.*` and `ytick.*`. Because there is not a fixed mapping
between WCS axes and Matplotlib `x` and `y` axes, the best we can do is
arbitrarily pick one axis from which to inherit defaults.

This is explained in the docstring.
Add unit test for default grid and tick style
Add argument to set tick width

And update original unit tests to explicitly set tick width and size,
overriding default values, so that they continue to pass.
made a new datasets module
functions return specific images now
cleanup
renamed cube function
datasets module now returns hdu data for the images