Fixed|libcommon|libdoom|libdoom64|libheretic|libhexen|g++: Compiler warnings (unused variables, signed/unsigned comparison)
Fixed|XG|libcommon: Error in XG stair build spread algorithm

Due to an old refactoring oversight the stair builder would fail to
determine the neighbor sector to spread to.

Plus some minor cleanup.
Fixed|Client|g++: Build error (missing include)
Windows: Updated envconfig.bat example

Now applying Qt 5.3's Qt Creator and jom with the /nologo option.
All Games: Improved -warp to support map URIs

One can now specify a map in URI form (e.g., E1M1) to -warp from the
command line.
Merge branch 'master' of github.com:skyjake/Doomsday-Engine