Get Visual Studio projects compiling again [CR]

Had to do the following changes:
* Add missing files to the project so they get compiled
* Had to fix ambiguous calls to math functions that were being called with ints, but the functions had both float and double variants.
* Added all the SDL libs required to compile the SDL config. I made these match the names of the libs as they are in the actual VC redist that is on the SDL website. I don't know what "libSDL.dll.lib" was that was already in the project, but that file is not in the official SDL redist. Perhaps it was a single combined lib built by someone locally?
* Added required preprocessor to SDL Tiles localized config. Changed the included names for iconv and intl to libiconv and libintl, as this is how they are named in the official vc++ redists from the GNU mirrors.