This commit change:
1) replace all keymaps with PLA ones.
2) add an alternative exit button (PLA_EXIT or PLA_CANCEL)
3) do the required change to the manual in order to match
code's changes.
4) add a missing key in the manual and show them in a table
Change-Id: Ie983c7673c9dec1a9daeb34f5edaaa3c8be7dd5e
Reviewed-on: http://gerrit.rockbox.org/129
Reviewed-by: Thomas Martitz <kugel@rockbox.org>
Tested-by: Thomas Martitz <kugel@rockbox.org>