BTC: BurnTimeCalcMFD v1.1 (C) 2004 by David Henderson -- orbiter@aibs.org.uk
     BurnTimeCalcMFD v1.2 (C) 2005 by Chris Jeppesen -- chrisj@kwansystems.org
     BurnTimeCalcMFD v1.3 (C) 2006 by Chris Jeppesen -- chrisj@kwansystems.org
     BurnTimeCalcMFD v1.4x(C) 2007 by Thomas Hagemeyer -- thomas.hg@web.de
     BurnTimeCalcMFD v1.5 (C) 2007 by kwan3217         -- ??
     BurnTimeCalcMFD v2.0 (C) 2007 by Thomas Hagemeyer -- thomas.hg@web.de
	 BurnTimeCalcMFD v2.4 (C) 2013 by Dimitris Gatsoulis (dgatsoulis)
	 BurnTimeCalcMFD v2.5 (C) 2014 by Szymon Ender (Enjo) -- ender-sz@go2.pl
	 BurnTimeCalcMFD v2.6 (C) 2014 by Szymon Ender (Enjo) -- ender-sz@go2.pl
	 BurnTimeCalcMFD v2.7 (C) 2014 by Szymon Ender (Enjo) -- ender-sz@go2.pl
	 
	 
CHANGES IN v2.7
===============
* Resolved sporadic freeze on startup due to displaying of uninitialized variables
* Resolved craft's "orbit freeze" bug when the MFD was closed and Time Acc. >= 10000 was applied
* Added new button - RCS for including RCS fuel in total DV calculations
* Internal: Changed "TBurn" ModuleMessaging variable to "InstantaneousBurnTime". TransX update required for GET button to operate correctly

CHANGES IN v2.6
===============
* Resolved CTDs when switching the MFD on and off
* Simultaneous multiple vessels support (can be pre-programmed!) thanks to MultipleVesselsMFD
* Added RCS Forward, Up, and Retro "engine types"

CHANGES IN v2.5
===============
* Communicating directly with TransX via ModuleMessaging library. Use SHIFT_G or GET button, when TransX displays DV and time.
* Added another, extensible button page thanks to MFDButtonPage.

CHANGES IN v2.4
===============
* EXT button, where you enter the extra fuel mass you are carrying in kg. It may be RCS or an External fuel tank or even the total. 
* Slightly different colors for improved visuals.

CHANGES IN v2.0
===============
* New interface for inputting vars (via inputbox)
* Burn can be start related to the distance to a target object
* New autoburnmode "burn by target distance" added

CHANGES IN v1.5
===============
* Some code cleanup
* Bug where engine group existed but was not connected to a propellant 
  resource - FIXED
* Works in SI or feet (for use with Space Shuttle)

CHANGES IN v1.42
===============
* Vars will be stored by chanching View or MFD. Use "Reset" to restart
* New Var: Rel. DeltaS distance will be indicate the relativ needed distance 
  to get DV to Zero (Relativ to an object where DeltaV == MFD-entered DeltaV)

CHANGES IN v1.41
===============
* CTD-Crash-Bug fixed when engine is not available at some spaceship-Add-Ons
* MFD is now displaying if the enigine is available or not

CHANGES IN v1.4
===============
* You can select the Engine you want to use: Main, hover or retro.

CHANGES IN v1.3
===============
* Compiled to work with Orbiter 060504 (only!)
* Auto Circularization (Autocirc) - Automatically calculate the timing and
  magnitude of the burn to circularize the orbit at either periapse or 
  apoapse.
* Compensation for non-unity propellant resource efficiency (necessary for
  precision maneuvers in the DeltaGlider-III)
* Accounts for entire docked stack mass when calculating burn timing. Note
  that this does not mean it will compensate for off-axis thrust or anything
  like that, so moving ISS will still take effort with thrust vectoring.
* During a burn, amount of DeltaV to go is displayed, in a continuous 
  countdown manner
* Manual burn time now counts down while waiting for burn start
* Timing for a burn at an apse (and magnitude for an Autocirc) is now 
  continually recalculated. This should help when using non-spherical gravity.
* Documentation fix! Timing modes and SHIFT_M are documented. Sorry about that.

CHANGES IN v1.2
===============
Many and numerous. 

* Compiled to work with Orbiter 050216
* Removed usage of MaverickTech's clever hacks, since the Orbiter API now 
  directly supports what MavTech.cpp was needed for
* Added Autoburn - The MFD can now automatically execute the burn. You can
  program it to execute the burn at periapse, apoapse, or some settable
  time in the future. It executes the burn such that half the dV is before
  the time mark, and half is after.
* Another variable is added, the manual delay timing. Variables are now 
  adjusted in a manner more similar to TransX, with the -+ pair changing
  the variable, [] changing the coarseness of the -+ change, and <> 
  switching variables.