Added
-----

- equinoctial, cylindrical and mean circular forms
- OMM in SGP and TLE formats are compatibles
- A lot of small additions to the documentation of existing functions/methods

Modified
--------

- Following horizon format changes

Removed
-------

- RSW and LVLV are not synonym to QSW any more
- Disable keplerian representation of non inertial CCSDS OPM