Update po files
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Merge branch 'master' into temp
Update po files
add minimal oauthlib requirement
do not require South package to be installed when it is not present in INSTALLED_APPS
Merge pull request #538 from tymofij/require-modern-oauthlib

add minimal oauthlib requirement
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Merge remote-tracking branch 'origin/master'
Merge pull request #537 from tymofij/optional-south

make South installation optional
Bring back decorator signal connecting (issue #537)

Signed-off-by: Michal Čihař <michal@cihar.com>
Merge branch 'master' into bootstrap

Conflicts:
	requirements.txt