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.

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)

adding in gauss_param object. Although it doesn't inherit from a complex type it can be used as one in equations as it overrides the various options

objects that have properties dynamically added to themselves need to declare themselves as new classes, with a base class of the original. Otherwise when we add properties we add them to all instances.

adding in more support for nodes. Can now access any node using kat.nodes.n1. Added in functions for Node object to set the gauss parameters. Only added gauss for w0 and z so far.

Adding in more parsing for finesse commands. Can no specify a chunk of finesse codee. Various other fixes included too. Currently GUI isn't working.