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.

setting defaults in test class more appropriately. Commits are started oldest first now when selecting multiple ones from the list