Making system bodies separately explorable

[lwho]

http://pioneerspacesim.net/forum/viewtopic.php?f=3&t=268#p3145

This is issue is for implementing no. 2 of the above post:

Selectively exploring bodies of a system (e.g. by Andrew's exploration probes). This would require giving each body its own exploration flag (or levels). More complex than no. 1, but probably not so much. Actually, having this, we don't need no. 1 anymore, as Lua could automatically mark every gas giant in the system explored etc.

• Exploration flag for SystemBody
• Properly integrate with system exploration (partially explored?)
• Show only bodies that are explored in system views
• Making it accessible from Lua
• Persisting exploration state

[lwho]

@fluffyfreak: Just for tracking. Don't hold your breath, yet.

[fluffyfreak]

@lwho no problem :D