Renderer switching

See merge request !550

Fix logfiles crashing Windoze (resolves #102)

Closes #102

See merge request !591

I got a compiler warning from P_PlayerHitsPlayer being too big

See merge request !581

haha log files

See merge request !567

Option to increase the turning speed

See merge request !553

Wipe styles cleanup

See merge request !525

The "SRB2" directive, for warning if a SOC isn't compatible

See merge request !551

OpenGL GIF movie recording

See merge request STJr/SRB2!549

Fix model texture blending

See merge request !546

Init MUSICDEFs regardless of music state

See merge request !532