Fixed insufficient error handling in narrow_to_wide, which caused a crash if the path of the userdata directory contained special characters that were not included in the used charset (which is used because of the font)

Better texture handling. Textures are not added to atlas if they are big, and atlas is not further made after it is full.

small fixes: crack texture, server build on windows, configuration file example, adding config file example to install

CMake working nicely on Windows, at least with MSVC. "Compiling on windows" section in README.txt updated.