[fix bug 898540] Skill listing and show pages.
[fix bug 920084] Better error message for already in use email address.
[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.
[Fix Bug 917343] Fix header responsiveness on all logged out screens.