Mass is denoted by m and not M anymore (necessary for mean anomaly)
Work on Anomaly-Conversions. Makefile & .gitignore adjustments
Cleanup
Revert "Mass is denoted by m and not M anymore (necessary for mean anomaly)"

This reverts commit a1134dfb67bfca3dc62cb3e3e5ba4fb96559613d.

Reason: some formulas contain m (meter) and m (Rocketmass)
Handle Tag Version numbers correctly
Cleanup and abstract-additions
Reloacted Lift Section
Reworked Forces and Acceleration Sections.
Added descriptions for ship thrust and rotation.
Extended description of anomaly conversions.