Add mouse grab callback for Heretic.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1282
Move GetSfxLumpName to shut up warnings

Subversion-branch: /branches/raven-branch
Subversion-revision: 1283
Make ENDOOM screen work on Heretic.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1284
Update HH-TODO.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1285
Remove ExtendedWAD variable; use gamemode == retail.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1286
Shutdown sound at exit, so that the music does not continue to play at
the ENDOOM screen.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1287
Fix up Heretic code for mmaped WAD I/O. Call W_ReleaseLump* instead of
Z_Free/Z_ChangeTag.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1288
Use sizeof for size of types, rather than hard-coding the size.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1289
Fix compile error.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1290
Fix crash caused by mistake in previous change.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1291
Set the title bar in Heretic.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1292
Swap retail/registered version title bar descriptions.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1293
Save Heretic configuration files on exit.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1294
Split out startup banner code into common code; display copyright notice
in Heretic.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1295
Fix sound crash on Heretic startup.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1296
Make Heretic main loop not hog the CPU.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1297
Add missing PROGRAM_PREFIX #define.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1298
Update HH-TODO

Subversion-branch: /branches/raven-branch
Subversion-revision: 1299
Add support for extra mouse and keyboard controls to Heretic code.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1300
Tidy up heretic start up messages.

Subversion-branch: /branches/raven-branch
Subversion-revision: 1301