The status bar at the bottom of the GUI is now populated with the
currently loaded calibration.

Removes all of the from __future__ imports that open and close the
brackets on the same line. This is most of them.

Also updated class_maker.py

- Remove repeated searching checks

- Split test into reasonable chunks

- Make rb_num naming consistent

The calibration tab is now able to notify any tabs that subscribe to it what the current calibration is.
For now, this allows the focusing tab to perform it's algorithm based on the most recently loaded calibration.

Initial version of the model. Currently missing the plotting, file creation, and file system interaction.

Non functional right now...