Update AssetsController.php

Fix invalid SQL
Update User.php

Fix incorrect Gravatar domain name
Update default.blade.php

Remove protocol from Google and jQuery CDN URLs, to fix insecure content warnings in SSL-only environments
Merge pull request #68 from abrahamvegh/patch-2

Fix insecure content warnings
Merge pull request #67 from abrahamvegh/patch-1

Patch 1
Merge branch 'refs/heads/develop'
Merge remote-tracking branch 'upstream/master'