Merge branch 'master', remote-tracking branch 'origin' into 0.5
Fix sphinx conf file
add support for groups
change authentication methods: progress I
Force user to accept service terms
Refs: #2019
merge with master
Merge branch 'master' of https://code.grnet.gr/git/astakos
Remove admin guide.
remove hardcoded urls to the astakos api services from the cloudar
change cloudbar to contain dynamic links
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