Only include NOT-BUGS in releases of Doom binaries, not other games.

Subversion-branch: /branches/v2-branch
Subversion-revision: 2662
Fix same error made before with -novoice command - grr!

Subversion-branch: /branches/v2-branch
Subversion-revision: 2663
Change to using V_DrawFilledBox to clear the intro screen instead of
loading and drawing PANEL0.

Subversion-branch: /branches/v2-branch
Subversion-revision: 2664
Fix crash at Heretic E2 end screen (thanks Leitbild).

Subversion-branch: /branches/v2-branch
Subversion-revision: 2665