corrected mag task switcher for good this time

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@444 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61
added ability to specify arbitrary roll/pitch/yaw translation for board mounting by alu.
this allows to mount FC vertically/upside down/etc easily.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@445 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61