[fix bug 915606] Revise API docs and move to RTD
[Fix Bug 920202] Tell tower where to look for l10n strings to extract
[fix bug 917960] Use remove 'www' from github.com and twitter.com

Also fixes nits.
Merge pull request #632 from glogiotatidis/917960

[fix bug 917960] Use remove 'www' from github.com and twitter.com
[fix bug 898540] Skill listing and show pages.
Merge pull request #636 from Sancus/920202-fixl10nextract

[Fix Bug 920202] Tell tower where to look for l10n strings to extract
[fix bug 920084] Better error message for already in use email address.
Merge pull request #623 from hoosteeno/docs

Revise API docs and move to RTD
[fix bug 919736] Clean broken EXIF data from avatars.
[Fix Bug 919558] Fix styles for community stewards layout + add link to image.
[Fix Bug 920590] Removing bootstrap references from main.less stylesheet.
Merge pull request #637 from glogiotatidis/920084

[fix bug 920084] Better error message for already in use email address.
Merge pull request #630 from glogiotatidis/919736

[fix bug 919736] Clean broken EXIF data from avatars.
[Fix Bug 908239] Add white background to non-logged in pages.
Merge pull request #624 from glogiotatidis/898540

[fix bug 898540] Skill listing and show pages.