- create a base class and make derived classes for each installation type.
- sort installations by type, not by player model.
- remove duplicated code for iriver (de)scrambling functionality and use the functions inside of the tools folder directly -- we already do the same for rbspeex.
- make bootloader file backup optional and allow choosing a target location.
- clean up some wording and add some more guiding messages.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18657 a1c6a512-1295-4272-9138-f99709370657