-Implement the -noblit option for -timedemo.

git-svn-id: http://odamex.net/svn/root/trunk@3928 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Change I_UnwrapTime to use bit masking instead of modulo.

git-svn-id: http://odamex.net/svn/root/trunk@3929 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Implement the -nodraw function for -timedemo.

git-svn-id: http://odamex.net/svn/root/trunk@3930 b0bcef46-2027-0410-bd56-ab726e9a1d04