Add ability to import from Optickle/FINESSE

[SeanDS]

Optivis becomes a lot more useful if it's able to read and import from Optickle and/or FINESSE.

This is probably easier with Optickle, since the 'optickle' object contains everything Optivis needs to know once it has been 'tickled'. FINESSE is more difficult and will involve command parsing.

Possibly an alternative to importing from FINESSE would be to instead import from Pykat.

Maybe a 'manipulator' class could handle the getting/setting of attributes between the GUI and Optivis components. That would make it easier to hook up Pykat to Optivis without having to make Pykat a prerequisite.