

v0.1 to 0.2

* fixed some unit system inconsistencies
* 3d plot option added
* spacecraft section allowing to define a rocket engine with propellant usage
* simulation timestep made configurable
* added state vector velocity components to plot parameters
* added low thrust burn definition
* added automatic recognition of pre-defined landing sites

v0.2 to 0.3

* option to add ephemerides for up to five additional bodies
* list option for celestial bodies
* plot options support relative coordinates for first celestial body
* added two demo ephemerides for Moon and Sun for Jan 2016

v0.3 to 0.31

* fix value of default acceleration when imperial units are chosen
* fix bug erratically preventing PEG-7 burns when impulse or constant burn models are chosen

v0.3 to 0.4

* added simulation of an orbital target and code to compute target-relative motion
* added a numerical fit of the Lambert problem between spacecraft and target

v0.4 to 0.41

* fix for T2 bug when doing Lambert fit in imperial units
* fix for PEG-4 fits when initial guess produces apsis at ThetaT > 360 degrees
* fix determination of proximity velocities to include non-local derivatives

v0.41 to 0.42

* fix for MET not being parsed when position rather than state vector is used to initialize
