Fix segmentation fault on map switch after in-game veto

[milkywayfarer]

Based on #189

• Moved StartDemoRecording() call to StartLive() function, as this is the most suitable location to start recording a demo.
• Codestyling fixes applied automatically on file save.
• Various fixes to demo recording and match states.

Tested out on Linux server with full BO3 correctly played and recorded (including in-game mapveto).