Leak of MidiThread fixed.

git-svn-id: http://audacity.googlecode.com/svn/audacity-src/trunk@13521 47890b92-0858-11df-a26f-8b716316a5bc
Change case RPM to rpm.
Further changes to Change Speed GUI to follow.

git-svn-id: http://audacity.googlecode.com/svn/audacity-src/trunk@13522 47890b92-0858-11df-a26f-8b716316a5bc
Remove text "in web browser" from help menu.
Conflicts with http://manual.audacityteam.org/o/man/help_menu.html

git-svn-id: http://audacity.googlecode.com/svn/audacity-src/trunk@13523 47890b92-0858-11df-a26f-8b716316a5bc