Declare const char* arguments to get proper string conversion. Some of
these warnings still remain, as it involves code from Source/ directory.
According to https://github.com/diasurgical/devilutionX/issues/279,
those fixes should not be made outside of SourceX/.
* Debian Package update
* Missing font & icons fix
* Fedora package update
* Fedora package update
* Fixing #333 Linux Font Path problem
* use of TTF_FONT_PATH
1. TTF no longer crashes on exit.
2. Art failing to load simply isn't rendered instead of crashing in random places.
3. Fixes empty line rendering in ttf_render_wrapped.cpp
4. dx_cleanup is now idempotent.