Gather some data about the heightmaps, and pre-convert them doubles instead of doing it every single bloody time they're used.
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into UnifyHMaps
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into UnifyHMaps
This is a noisey commit due to a few const changes.
The actual meat of it is a new TerrainColorEarthLikeHeightmapped.cpp file which splits the heightmap using branches out of TerrainColorEarthLike.cpp and simplifies them both in due course.
Also TerrainColorTFPoor.cpp no longer has the heightmap branches since IT NEVER USED THEM.
Assert and const again.
Assert bounds check and if null checking.
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into UnifyHMaps

Conflicts:
	src/TerrainBody.cpp
Make the RenderData const, where required to change it for the blend masks use a copy.
SpaceStation.cpp - don't render the city OR the station if we're too far away.
ModelBody.cpp - reserve the vector for the number of lights.
CityOnPlanet.h/cpp - Remove the per building enabled flag, instead keep a list of the enabled buildings and only draw those. Also add a city wide m_clipRadius flag and test the whole city before trying to render buildings.
Reduce the amount of work the CityOnPlanet::Render method is doing per building.
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into ProfileCities

Conflicts:
	src/scenegraph/Billboard.h
	src/scenegraph/Group.h
	src/scenegraph/LOD.h
	src/scenegraph/ModelNode.h
	src/scenegraph/Thruster.h
Compiling again.
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into ProfileCities
Prevent the OSPosic fpexceptions from compiling under OSX - it breaks it.
simple bash script to launch pioneer correctly (used for binary diet)
Initial cut of an OSX binary build script.
Filename magic to align with the other uploads
Merge remote-tracking branch 'upstream/master' into gnu-osx
pretty up the osx build script
dock update