Adding exception handling to add puts as extra lines if they can't be handled for backward compatiability

Adding parsing for put commands. This reads in put commands and links them to the objects now. Disabling the object that is being put to or the thing that is putting will ensure that the put command isn't generated, so no need to use removeLines for puts now

Added functionality to produce a graph of the node network. Relies
on pygraphviz.

Getting pykat piping sorted. Changing version to v1.0.0, which should be used with Finesse v2.1 or more. Removed printerr and printout from the kat.run() command. The stderr and stdout can now be found in the output object, out.stdout and out.stderr.

Fixed issue with the noplot command. Now it works for detectors and functions when using the pykat plotting method.

Added noplot attribut to class func, and changed from using np.abs to np.real when plotting abs finesse outputs with out.plot()