allowed for arbitrary radii in plot_hex.

For some reason.
Trying new things in moment tests.

Currently trying to smooth signal before defining the window.
Added formal calculation of uncertainty on the moments in ADEUtils
Spead up line_profile. Also made it more correct.

Previously I was doing what was essentially a convolution by hand in a
very stupid and slow way. A call to np.convolve has resulted in a drastic
speed up.

starting
Started adding a function to compare multiple models to the same data
Merge branch 'master' of https://github.com/eigenbrot/snakes