update git ignore list
migrate to v2014.3 for our 0.29 release and #7
set different priorities for different branches

Up to now the default was set for all branches. A priority of 0 however
means an "instant" update leading to a possibly high load on the net and
the update server. The idea of GLUON_PRIORITY was to spread this. So the
values used now are 14 days for stable, 3 days for beta and still 0 for
experimental. This means stable updates come after some time but
eventually after two weeks, beta after at most three days and
experimental every night.
Merge branch 'master' into migrate

Conflicts:
	README.md
	build.sh
Merge branch 'master' into migrate
Repo vor Branch-Wechsel bereinigen

"make clean $VERBOSE" before "git checkout master"

13:52 < LeSpocky> aber vielleicht sollte ich das make clean vor den wechsel des
                  branches tun
13:53 < LeSpocky> bzw. noch ein weiteres vor den checkout vom master tun
13:53 < LeSpocky> dann passt das nämlich auch zusammen
13:55 < LeSpocky> _MrTux_: füg mal testweise in build.sh ein `make clean
                  $VERBOSE` vor `git checkout master` ein, wenn es immernoch
                  nicht geht
Merge pull request #22 from penguineer/build

Repo vor Branch-Wechsel bereinigen (müsste eigentlich in master, aber das landet da sowieso bald dann)
Merge pull request #20 from FreifunkMD/migrate

update to v2014.3 for 0.29