Fix the remaining issues found when finishing the release builds on Windows.

git-svn-id: svn://svn.icculus.org/fs2open@10640 387891d4-d844-0410-90c0-e4c51a9137d3
OpenAL changes

git-svn-id: svn://svn.icculus.org/fs2open@10641 387891d4-d844-0410-90c0-e4c51a9137d3
log if file can't be deleted

git-svn-id: svn://svn.icculus.org/fs2open@10642 387891d4-d844-0410-90c0-e4c51a9137d3
better way of moving files
fix indeterminate bug when deleting temp files

git-svn-id: svn://svn.icculus.org/fs2open@10643 387891d4-d844-0410-90c0-e4c51a9137d3
run innoextract through the shell because otherwise it doesn't work on XP

git-svn-id: svn://svn.icculus.org/fs2open@10644 387891d4-d844-0410-90c0-e4c51a9137d3
Fixed gr.drawOffscreenIndicator() returning wrongly scaled coordinates.

git-svn-id: svn://svn.icculus.org/fs2open@10645 387891d4-d844-0410-90c0-e4c51a9137d3