1) this patch replace all keymaps with PLA ones. It also clean some optionnal
compiling that are not needed anymore througt PLA.
2) the patch also made required change to the manual in order to match code's
change.
3) it also add an alternative exit button (PLA_EXIT or PLA_CANCEL).
Change-Id: If6e78711eaab1dd2c907b418ba72c8789ceaa72b
Reviewed-on: http://gerrit.rockbox.org/105
Reviewed-by: Thomas Martitz <kugel@rockbox.org>
Tested-by: Thomas Martitz <kugel@rockbox.org>
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