axes_grid: add grid support for rectlinear axes
AxesGrid: implemented axisline style
testing: add TODO point
testing: add a TODO list
add remaining two unhinted baseline images
adjust netcdftime since fancy indexing doesn't work in pupynere.
Update baseline images for hinting turned off.
buildbot: set exit code when running tests
store old rc params before tests and then update after
add test_image to default suite
