Improvements to mie code

[BenjaminMidtvedt]

Fixes some standing issues with Mie simulations. Primarily:

• Input and output polarization can now be chosen independently.
• Bad combinations of optical parameters now results in a warning. A combination is bad if the resulting pupil is too large and would result in inconsistent results.
• Particles near edges are no longer deformed, but rather wraps to the other side of the image.
• Some minor errors in the internal calculation of Mie theory have been fixed. These have a very minor impact on the resulting image.
• The number of terms to use in mie calculations are now calculated correctly