Most of the MJ SmartASS interface

Most common features are implemented and working - only the Surface and Advanced menus are missing (may just remove them, since neither is going to be simple to make work).  Bonus: Force Roll angle can be adjusted by a configurable number of degrees for each push of the Home button.  One major bug: this interface only works if the SmartASS window in MechJeb is open.  I haven't investigated that yet, but I'll look into it tomorrow.