Retroboot beta release on 28 December 2020

Retroboot is a new coreboot distribution, forked from the Libreboot 20160907
build system. The purpose of Retroboot is to provide pre-compiled ROM images
for any system that coreboot supports. Retroboot, based on coreboot, provides
hardware initialization on supported x86 computers; it sets up the hardware and
boots an operating system such as GNU+Linux, BSD and Windows.

This release, marked beta, released on 28 December 2020, supports the following
machines:

* ThinkPad X220
* ThinkPad X230
* ThinkPad X230 Tablet
* ThinkPad T60 with ATI Mobility Radeon X1400, PCI ID 1002:7145

For documentation, refer to the accompnying source code release archive.
Documentation is included in that archive. You can also refer to the
documentation hosted directly at https://retroboot.org/ and this is more
recommended due to it being more up to date.

This is a public *beta* release. The ROM images provided in this release are
NOT guaranteed to boot correctly on your machine. If you install this, you
should make sure that you have SPI flashing equipment (for flashing 25XX NOR
flash) and, ideally, debugging equipment such as EHCI debug dongle.

Extensive testing is required for all of the ROMs in this release, so user
testing is highly encouraged!
