layerman: switch meta-telephony to github backup

Upstream vanished :(

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
oebb.sh: add workaround for -k propagating errors

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
layerman: meta-kde -> meta-kde4

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Merge remote-tracking branch 'upstream/angstrom-v2014.06-yocto1.6' into angstrom-v2014.06-yocto1.6

Conflicts:
	conf/bblayers.conf
	sources/layers.txt