[Kstars-devel] Remove KStarsData from KSPlanetBase and subclasses

[Khudyakov Alexey]

Hello

Since KStarsData is singleton there is no need to carry pointer to it in KSPlanetBase and its subclasses. 

Proposed change consists in removal of KStarsData* field from KSPlanetBase, KSAsteroids, KSComet and removal KStarsData* parameter from constructors.

However extensive this change may appear it's difficult to do wrong because of compiler checks. 
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  Khudyakov Alexey