[fix bug 909324] User can change own email.
[fix bug 915764] Api returns only users with completed profiles.
[fix bug 891001] Sort skills in curated groups by number of members
[fix bug 835976] Upgrade sphinx
Merge pull request #616 from glogiotatidis/915764

[fix bug 915764] Api returns only users with completed profiles.
[fix bug 918060] Use locale aware redirect.
[fix bug 711329] Respect client's locale on login.
[fix bug 918513] Distinct group search results.
Merge pull request #618 from hoosteeno/891001

[fix bug 891001] Sort skills in curated groups by number of members
[fix bug 857702] Re-add hCard and h-card support.
[Fix Bug 918935] remove tshirt field from the api
Merge pull request #622 from Sancus/removetshirtapi

[Fix Bug 918935] remove tshirt field from the api
Merge pull request #619 from hoosteeno/sphinx

[fix bug 835976] Upgrade sphinx
[fix bug 915606] Revise API docs and move to RTD
Remove deprecated common/init.py
Merge pull request #620 from glogiotatidis/918060

918060
Merge pull request #626 from glogiotatidis/remove-old-data

Remove deprecated common/init.py
Merge pull request #615 from glogiotatidis/909324

[bug 909324] User can change own email.
[fix bug 919926] Re-list external accounts in profile page.
[fix bug 919580] Universal ITEMS_PER_PAGE pagination constant.