Local light sources: sources with VIS_COCKPIT visibility flag are now skipped in external views, and sources with VIS_EXTERNAL are skipped in cockpit views to avoid filling the available slots with inactive lights [issue #1319]
Bug fix: Vessels located below planet reference radius did not have planet shadow applied.
* added VC2015 project files
Minor fixes to build target locations
Included DX7 SDK files as externals
External dependencies for OVP
Bug fix: new style surface labels would not render when quadtree policy was set to cache+archive
Added support for new quadtree-based surface labels to D3D7Client