Merge pull request #66 from MOARdV/master

Improve JSIOrbitDisplay automatic scaling
Merge pull request #67 from MOARdV/master

Last round of tweaks for JSIOrbitDisplay.  For now.
Add ButtonClearTarget to internal buttons handler
Add Rendezvous Autopilot button and Force Roll 0, +90, 180, and -90 buttons.
Add Docking Guidance to MJ page handler.