Update the VS2013 projects for added files.
Merge remote-tracking branch 'fluffyfreak/UpdateVS2013'
add license headers
Add initial JSON project and files to VS2012 and VS2013Express.
Also copy the makefiles that RobN did so it might even work on Linux!
Merge remote-tracking branch 'fluffyfreak/JSON'
Merge remote-tracking branch 'upstream/master' into Xcode
Update Xcode project file

* add new file to Xcode project
[src/terrain/TerrainColorEarthLikeHeightmapped.cpp]
Update Xcode project file

* add new files to Xcode project
[contrib/json/*]