This is a port of wolf4sdl to Rockbox, via my SDL port.

It *should* work on pretty much anything with a color display, but I
have no idea since I haven't tested it. Place the original data files
in /.rockbox/wolf3d/. Surprisingly even sound works (and doesn't sound
like crap, either!).

TODO (in no particular order):
 * decide whether or not to merge this (license issues)
 * flesh out manual entry (screenshots)

Change-Id: I64c2ba035e0be7e2f49252f40640641416613439

Adds screenshots for all supported targets. Also adds a bit of information
to point users to the data files.

Change-Id: I5e0f1bcdb73690a14616a3e486228c73b1617ffc

Original patch by Stanislav Chizhik
Udpated by Igor Poretsky & myself

Change-Id: I472d4852ac25885658245f077723e4c98b9ad9b8

Originally by Stephane Doyon.
Updated by Alex Wallis, Igor Poretsky, and myself.

Change-Id: I15a06f7774c886cefd9c2cb93230d67de3e5f9a9

Original patch by Alexander Spyridakis
Modified by Steve Bavin and Igor Poretsky
Keymap fixes by Marianne Arnold

Change-Id: I5a252d97d2b05c533e048931f7354f4261f76499

Manuals were showing Advanced Keylock even for devices that don't support it

Change-Id: I8e40a76bcbba9c67a4680d505c507a0b09f7f203

Modified version from ticket, taken from Igor Poretsky's tree, and
further modified to incorporate feedback.

Change-Id: I9284497d53a0247a51739d29fdc1db5fbbebfadc

Change-Id: Id204276387d55ba2276530ed1cb6ee827e28062a

This reverts commit 6f0320a9535bc1aa81d83fa879ac14d5ee603658.

Change-Id: I7425d422a4a0af7a49e9194cfe0bb55d431bc401

Allow user to select cpu undervolt

There have been quite a few issues across the SANSA AMS line related
to CPU undervolting while most players show greatly increased runtime
some crash.
Rather than constanly upping the voltage we now have a
setting with a safe value for all players and the option for lower voltages

I plan to add a few other options here later such as disk
timings and maybe some other clocks/experimental settings

Added: Disk Low speed option for AS3525v2 devices cuts
	frequency to 12 MHz from 24 MHz
Added: Disk Low speed option for AS3525v1 devices cuts
        frequency to 15.5 MHz from 31 MHz

Added: I2c Low Speed AS3525 devices, should be bigger improvement for v1 devices

Fixed: Debug menu for AS3525v2 No SDSLOT frequency,
	Showed IDE freq though it is unused

Added: DBOP and SSP underclocking affects display on v1/v2 respectively

Fixed: debug menu now has SSP frequency, and SSP_CPSR

Update: made settings menu more generic

Update: cleaned up code

Added: Clip v1 & Fuze v1 didn't have HAVE_ADJUSTABLE_CPU_VOLTAGE.
	not sure why but,  waiting on testing to confirm

Added: C200v2 and E200v2 devices and HAVE_ADJUSTABLE_CPU_VOLTAGE.

Fixed: v1 devices don't like display timing set lower (dbop)
       v1 devices don't have a divider set for ssp (causes divide by 0)

Fixed: ClipZip display lags with Max SSP divider changed from 0xFE to 0x32

Fixed: v1 devices didn't work properly with highspeed sd cards
	Added code from http://gerrit.rockbox.org/r/#/c/1704/
	Added powersave and IDE interface enable/disable

Added: V2 devices now have powersave enabled on sd interface

Update: cleaned up code, lang defines, added manual entries

Update ssp clock mechanism added calculated ssp divider to clipzip

Update turn display clock off when clip+ turns off display

Fixed: clipzip wrong register for SSP clock

Change-Id: I04137682243be92f0f8d8bf1cfa54fbb1965559b
TODO: add other players?