Fixed centered home on safari. Flexbox requires -webkit. Fixes #873
Updated css linter. Fixed scss bugs. Ignore Known Properties error because is a known fallback issue required by browsers but still could give us nice information about bad code practices
Remove unused local variables on main common module file.
Simplify the tg-check-permission directive.
Remove unused attachments controller mixin and related sparse code.
Normalize resource urls related to attachments.
Rewrite attachments directives and make them works as isolated components.
Remove obsolete jade partial related to attachments.