Added "GitHub Theme URI" field

Added "GitHub Theme URI" field for https://github.com/afragen/github-updater
Fixed Search + 404 page.  Footer credit changes
improved italian translations
Merge branch 'pr/39' into dev-6-14
Merge branch 'pr/38' into dev-6-14
Updating custom metaboxes to v1.2.0
Merge branch 'dev-6-14'