19-11-2017 : Trim corrected
*******SUMMARY*******This release for the 20160828 Orbiter version was written some month ago.I release it today, after a brief overview, because it gives some corrections and improvements.Initially based on the Attitude MFD this MFD offers basic features in orbital attitude control:  orientation relative to orbital velocity (prograde, retrograde or whatever, TOR & RPM pitch up control) or to a target velocity,  orientation relative to a target,  and absolute orientation in ecliptic frame.There is a docking mode which allows to set the correct orientation between the 2 docks or with the targeted vessel relative velocity.It can also control the relative distance between the 2 spacecrafts and therefore it allows pseudo autodock (obviously a direct manual input method, not an fully autopilot).The landing mode can make an autoland on gravitational reference bodies with no atmosphere or tiny atmosphere (ex:Mars), with tailsitting or hovering method (pitch up or pitch down).Up to 32 spacecrafts can be controlled simultaneously and every spacecraft can have up to 32 instances of PursuitMFD running in the same time.Be aware that closing or changing the mfd WON'T stop the attitude control. To do so you will have to toogle off manually the Hold mode (directly or in the Summary page).To stop the background calculations, you will have to delete the spacecraft from the list in the Summary page (except the focus vessel).It should works fine with most of the vessels (I haven't try everyone...).!!!!!! IMPORTANT !!!!!! :for a correct control, MFD refresh rate in the Orbiter parameters should not be set too low (0.1 or less is good)and the maximum acceleration should not be higher than 100x (however limited at some critical phase).There can be some incompatibilities with scenario saved with previous version of PMFD. just remove the relevant MFD part inside the SCN file.**************RECENT CHANGES**************Supports Orbiter 2016 elevation modeling of planetary surfaces.Improvements in attitude control (internal use of quaternions for large attitude changes).Improvements in landing mode:
  - introduction of 3 decision landing modes with a manual cutoff alitude setting,  - possibility of autobreak when landed to give full stop on non-flat terrain (Orbiter 2016),  - new calculation in orbital trajectory prediction for better deorbiting burn time prediction,