non-important
Merge remote-tracking branch 'origin/marcus' into Wiktor
minor changes
small changes

updated deltav and created a separate class for fb_prop
Fixed: DV, SpecRunner tests, ...
style update

functions moved to core namespace and some function names changed for
consistency
minor changes & trajectory visualisation added
Merge branch 'Wiktor' into marcus

Conflicts:
	spec/astrofunctions.js
removed debug output from astrofunctions and fixed a severe bug in jDE