README: Fix Version and Release Date fields.

As this README is in master branch the Version field should be master and the
Release Date should be not released. After switch to a stable branch we should
modify these fields with proper information.

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
linux_git: igep00x0: Switch to use device tree based kernel.

As this package is only for development purposes, and we have initial
support for device tree in mainline, I think it's time to switch to
a device tree based model.

Note that this package is not enabled by default, and for that reason,
this update doesn't break anything. To use this recipe you should change
the DEFAULT_PREFERENCE to a bigger value.

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
u-boot_git: Latest mainline u-boot code.

Right now it is only for testing purposes, to use this recipe you should
set the DEFAULT_PREFERENCE to a bigger value.

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Merge pull request #16 from eballetbo/update-dev-packages

Update dev packages