Merge pull request #13 from savander/DDRace64

Kill protection
Remove kill message
Kill protection cleanup
Default kill protection value
Helpers text
Switch /pause and /spec
DemoPlayer: Refuse to overwrite demo
Merge remote-tracking branch 'def/DDRace64' into demoslice
Fix crash in kill protection
Merge pull request #14 from east/demoslice

Demoslice: Refuse to overwrite demo