Refactor bitmap directories and master images for ARM work.

This change moves the old bitmaps (Mario, Alex, ZGB) and their supporting
scripts into a subdirectory, and creates a new set of images at 1366x768, in
PNG format.

This is preparation for providing a complete set of localized BIOS screens
to use as the master for all new platforms.

The plan is that these master images will be scaled, cropped, and converted
into the correct formats for each target platform, and those binary
bmpblocks saved in their own package. Only if a translation changes should
we need to regenerate the bmpblocks.

These new images do NOT (yet) include locales that cannot be rendered
correctly by ImageMagick, and not all of them have been fully vetted by the
localization team.

BUG=chromium-os:13037
TEST=none

Change-Id: Ic25832aad3c6cc36879db204c2579395014af311
Reviewed-on: http://gerrit.chromium.org/gerrit/5508
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
690 files changed