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Removing extra lines and spaces from email templates.
Decode contact email special characters.

Rename ASTAKOS_POOLSIZE to CYCLADES_ASTAKOSCLIENT_POOLIZE;
expose it to the conf file.

in snf-common settings

Use Astakos' Authentication URL as a single entry point
for the synnefo API.

- avoid registering root url in case <base_path> equals to root url
- additional helper redirect for non trailing slash <base_path> endpoint

webproject contains django command line utils which are imported from synnefo
apps packages.

According to commit: b698d39dd6cbe4bf47b63ed0d6a98b9b126ca40e
views defining their response 'Content-Type' should set the
'override_serialization' attribute of response to 'True'.
However, this was missing in the specific view.
Now this code is moved in ``put_object_headers`` that
is used by both HEAD & GET object requests.

Refs: #3997
k

Implement API call to server statistics about servers and networks.

remove trailing /tokens from `Authentication URL`