Added Test/Specs

Jasmine is a testenvironment which I added to TDD a bit. Still working
on the coffee-version of the mga_part problem.
Merge remote-tracking branch 'origin/master' into marcus
minor change

still don't work, need to fix this.
safety commit
added additional tests

specs added for astrofunctions in general (propagate lagrangian seems to
be bugged). There is also a first version of the DV-computation in the
mga_part problem.
minor and totally unimportant change
Merge remote-tracking branch 'origin/Wiktor' into marcus
Merge remote-tracking branch 'origin/marcus' into Wiktor
minor changes