Conflicts:
	pykat/finesse.py

adding in new photodiode object which has f1,phi1,f2,phi2,etc., properties so that they can be tuned/put/set. Not fully transffered over from previous one yet.

Large amount of changes to the param object which now include being able to put and set parameters and commands. Also adding the modulator component.

adding string conversion for detectors and components to return its name, you can then get outputs like out[kat.pd1] or out['pd1']

2d plotting examples, probably want to wrap these plots up in a function to make it easier in future. Fixed ordering of output rows/cols in the stored matrix for 2d outputs.

(after iterating quite a bit about the format, I think this
is a good approach at automating a sequence of files,
to be continued...)

in readable form.

Fixed issues with n > 2 gratings and added a pass through test which takes a Finesse script, parses it and then outputs it again (to test input/output of component classes)

changing append to extend for adding base class attribute code. Also adding real and imag properties to the gauss_param object to reflect that it is a complex number

Added abstract class for mirror and beamSplitter classes, providing all of the shared functionality.