Command Class Additions/Fixes

Resolved gh-1
Fixed issue involving an invalid cell array concatenation in
ParameterList for SimCMD.
Static methods "CommandList" and "Usage" added to abstract Command
superclass.
Refactor

Miscellaneous Refactoring. No major updates to scripts.
Merge branch 'master' of https://github.com/ShadowsHax/CommSim
Merge pull request #3 from ShadowsHax/C++

C++ branch commit merge
Merge pull request #4 from ShadowsHax/master

master-C++