J. Kissel, A. Pele

We've begun the clean up and unification of design for optical lever damping that has begun to slowly and differently percolated through suspension types and sites. Arnaud has created a library part called 
${userapps}/release/sus/common/models/FOUROSEM_STAGE_MASTER_OPLEV.mdl
a week or so ago which has been used in the modified 
${userapps}/release/sus/common/models/QUAD_MASTER.mdl
part which covers a generic QUAD suspension. However, there were still a few bugs in that library part which I fixed up:
 - breaking a vestigial link to the beam splitter master library part, 
 - connecting the ODC damping status up and out to the top master level adding two new bits

We've not compiled anything and the MASTER model parts remain uncommitted. We'll compile, install, restart, and restore, and then clean up MEDM screens tomorrow.

Note that we are cleaning up this stuff so that we can make progress on all of the ECRs that HAVE been approved, including watchdog clean up, adding EPIC storage of alignment offsets, adding dither alignment paths, and adding BSFM M1 to M2 stage damping. 

Debate over whether to include optical lever damping in DRIVEALIGN path (which contains frequency dependent alignment decoupling [say if the P2Y coupling is large] and the plant compensation filters [to convert complicated P2P and Y2Y transfer functions into single-pendulum-like transfer functions]):
- Currently QUADs feed optical levers through DRIVEALIGN matrix, motived with the argument that "we shouldn't have 10 different paths to actuate on a stage. If we put the effort into 'diagonalization' of one path, it should apply to all other control loops."
- The BSFM does NOT feed through, because it was put in quickly before any such discussion was had, or any effort was put in to 'diagonalization'
- The HLTSs currently have no optical lever damping, but LLO commissioners have requested it.
- If we use Arnaud's FOUROSEM_STAGE_MASTER_OPLEV for all three (QUAD, BSFM, and HLTS) suspensions' lower, FOUR OSEM stages, then we'd only have one library part to maintain. Good.
- HOWEVER, we've already approved to have M1 to M2 stage damping on the BSFM, which means it's M2 (FOUROSEM) stage has to stay unique.
Gosh darn it. Note LHO hasn't measured if we see the same SNR and damping improvement that LLO got from this unothordox extra damping...