Social share

[aquilesC]

This updates several things:

• Adds social image to the Answers (should close #62 )
• Adds shortcuts for creating Answers directly on the Admin
• Adds better styling to the admin (favicon, text, logo)
• Adds help text when creating an answer so editors know the impact of things
• Displays more information of the experts, allows filtering and sorting
• Cleans up a bit the unused snippets and tempalte tags (footer tags and bulma templates)