Downgraded "angle support" to backlog in TODO.TXT
Bumped BDHero version from 0.7.5.0 to 0.7.5.1
Fixed BD-ROM disc insertion/removal detection in FormMain: avoid NPE, always run in background thread, purge invalid menu items, and re-detect when menu opens
Updated TODO.TXT
Bumped BDHero version from 0.7.5.1 to 0.7.5.2