mirror params.

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

want to use things such as '1n' in pykat, it just needs
to be used during the init constructor which is used when
reading finesse code.

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.

completly changing how node connections are stored: node_network (kat.nodes) now stores all the information regarding which node is connected to which component and vice-versa. If any of these connections change it is handled in node_network. All the compoents and nodes no longer store the connection information locally, they must reference directly from node_network otherwise weird clashes will occur. Not fully tested yet.

demodulations.

the temporary kat file into local folder.

- extending SIfloat to work with lists
- adding SIfloat to axis conversion.

Conflicts:
	pykat/finesse.py