Changed the mesh level from 5 to 4. This seemed to speed things up when the screen was zoomed out. You are encouraged to try different mesh levels yourself. You can change it in skymapcomposite.cpp on line 55. I don't recommend using levels greater than 6.

FYI:

level # of trixels
----- ------------
2 128
3 512
4 2,048
5 8,192
6 32,768

Added 4 new data files that contain pre-computed indices for the constellations. This greatly speeds up the constellation boundary initialization. If the index file does not exist, we fall back to computing the indices. There is a separate index file for mesh levels 3 through 6. There is also a mechanism for creating the data files in ConstellationBoundaryLines::init() by setting verbose to -1. This will cause the indices to be computed and printed on stdout.