Adds the PIXe driver to the example instruments, as well as specifying it as a file to be loaded in the init.py file for instruments. Played around with a new idea here: making the drivers for the instrument interfaceable from the command line. You can tell the command line the function you want to run, and the file will do so. May possibly make testing and troubleshooting a bit simpler.

Adds the driver for the SMU file and renames the NI PIXe-1084 file to 4322 to match the actual device the file drives. The SMU drives has capability to just:
1.) set voltage
2.) set current
3.) set voltage get voltage
4.) set votlage get current
5.) set current get voltage
6.) set current get current
The init files were changes as well, and the requirements.txt was also altered to add the requirements for the two files in question.

Just ensures that the correct class name is called and not the previous ones.

Adds the General Photonics Polarization Synthesizer to the repo. Funtionalities are as follows:
-Can set the polarization via s parameters, as well as to set types based on the PSY toggle types.
- Also can enable/disable polarization tracking.
-Can measure input polarization
-Can measure input power

Adds drivers for the laser and power meter modules of the Keysight 8164B, as well as for the PCD 104 polarization stabilizer. Also:
-Edits made to Measure.py to test the interoperability between the Keysight laser sweep.
-init file for instruments edited to make modules accessible from GUI

Last commit misspoke, this includes the laser module for the Keysight.

…trol/ProberControl into aim_development_branch