Custom name for Event Mode. Song colors!

- Added the possibility to define a custom name for records stored when
playing in Event Mode. The name can be defined in StepMania.ini under
the option" EventModeName"
- Borrowed from SM 3.9+ the possibility to specify a custom color for
the song in the musicwheel. Like in 3.9+, it's #MENUCOLOR in the .sm and
.dwi files.