Update trunk version to 3.6.19 to make sure nightlies are now properly indicated as newer than 3.6.18.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9547 387891d4-d844-0410-90c0-e4c51a9137d3
pre-Antipodes Staging Merge: "Inferno" build options go away, INF_BUILD settings now "default" settings.
Fixed and made consistent across all projects the Build Output names ("Debug" used for Debug builds at the very end of the file name before the extension and after other options such as SSE, where applicable)
Other unused #defines or #ifdefs removed: DEMO build Related, STANDALONE_ONLY_BUILD (already covered by -standalone command line flag)

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9549 387891d4-d844-0410-90c0-e4c51a9137d3
Whoops. When removing #ifdefs, check the #else block.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9550 387891d4-d844-0410-90c0-e4c51a9137d3
And lets not forget Global Section headers.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9551 387891d4-d844-0410-90c0-e4c51a9137d3
Update to r9550: Make sure that we keep the right directory default for the reading of current player Pilot files until the Pilot code goes in.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9552 387891d4-d844-0410-90c0-e4c51a9137d3
aaaaaaaaand finally, lets make sure that we can actually see the "Inferno" directory for all those pilot files. *sighs* That had better be everything.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9553 387891d4-d844-0410-90c0-e4c51a9137d3