Add a linker flag on Windows allowing the game to be large address aware. This allows the game to use more than 2GB of RAM. https://msdn.microsoft.com/en-us/library/wz223b1z.aspx
However, this can mask memory issues, so this flag will not be enabled by default. The autobuilder will use it, so SVN playtesters and release users can benefit from it. Windows users compiling the game themselves will have the 2GB limitation.