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

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.

fixing a number of subtle errors which kept this from running on my machine, such as temporary file without name, subprocess call with encapsualted flags.

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.