test and integrate optimvar() (and sym) within abstractZono classes

[jonaswagner2826]

[jonaswagner2826]

testing w/ sym done... mostly works for everything
TODO:

• test the optimVar fully
• move onto discussion of what we'd like to do with it as it isn't going to work for all functions w/ the same methods

[jonaswagner2826]

completed testing of optimvar()... semi-functional in the base classes

[jonaswagner2826]

Takeaway:

• For our immediate use the optimvar works for everything within memZono...
• The mtimes() can be modified for abstractZono to work in that as well (eliminate/modify some checks for double)

TODO:

• discuss w/ Justin Koeln about any changes that could be applicable to base zono classes

[jonaswagner2826]

@jruths - This is a meet w/ @JKoeln on-hold about implementing optimvar() and sym() w/in zonoLAB... (I could also just make a github issue on the main zonoLAB and update it as a pull request)

[jonaswagner2826]

to be done w/ optimZono in the future