layerman: fetch meta-ros

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: print layername in changelog

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: only show layers with changes in changelog

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: activate meta-ros and meta-ruby

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: update meta-ros

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
oebb.sh: grep for word DISTRO

so that the DISTRO variable won't be wrongly assigned if, for
example, local.conf contains DISTRO_FEATURES

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Merge branch 'angstrom-v2012.12-yocto1.3'