2.sorry for adding the TimeData class

Resolve "Decouple the line of visibility"

See merge request orekit/oreczml!56

Merge branch '62-add-user-ability-to-choose-polygon-settings-in-coveredsurfaceonbody' into 'develop'

Resolve "Add user ability to choose polygon settings in CoveredSurfaceOnBody"

See merge request orekit/oreczml!59

Issue 59 : Fixed the problem of satellite.png that didn't get copied in the...

See merge request orekit/oreczml!58

Resolve "CzmlGroundStation should represent only one station"

See merge request orekit/oreczml!55

Merge branch '53-add-an-influencesphere-object-and-change-the-color-of-the-orbit-of-an-interplanetary-when-it' into 'develop'

Resolve "Add an InfluenceSPhere object, and change the color of the orbit of an interplanetary when it crosses a new sphere of influence."

See merge request orekit/oreczml!53

Resolve "Add an InfluenceSPhere object, and change the color of the orbit of an interplanetary when it crosses a new sphere of influence."

Resolve "Renaming the Satellite object into Spacecraft"

See merge request orekit/oreczml!52

Corrections applied to some tutorials where builders were not used.

Corrections applied to some tutorials where builders were not used.

Corrections applied to some tutorials where builders were not used.

Resolve "Add station visibility "circle" in 2D mode"

See merge request orekit/oreczml!51

Resolve "Add station pass visualisation in 3D mode"

See merge request orekit/oreczml!50

Changed the .gitmodules to point to the orekit data oreczml that will not change.