Add ploneintranet.theme for Berlin sprint. Read the ploneintranet README!
use https URL for ploneintranet.theme
use "berlin" branch
avoid loremipsum brownbag release
add plonesocial.core
also pull ploneintranet.theme
avoid mr.developer noise
Add plonesocial.core to Makefile
merged all berlin branches to master
guard against accidental release of ploneintranet.theme