Update MisalignImgs_Uniform.py

Fixed error when shifting about tilt axis 1 or 0.
Update MisalignImgs_Gaussian.py

Fixed error when shifting about tilt axis 1 and 0
Merge remote-tracking branch 'hovden/master'
Merge remote-tracking branch 'hovden/patch-1'
Added the license to the main repo, along with a short README