[EPIC] Host and User Profile Managment

Each user should have the ability manage their settings, host and profile details. ProKos should be able to do the same with additional permission on building relations between users and hosts, assigning them to show etc.

Sub Tasks

• steering#57 (closed)
• steering#58 (closed)
• steering#139 (closed)
• Data model: Add optional relation between user ... (steering#166 - closed)
• [STORY] As a user I want an UI to manage my ava... (dashboard#86 - closed)
• [STORY] As a ProKo I want a simple way to creat... (dashboard#219 - closed)
• Implement host and user profile permissions (steering#227 - closed)
• Document user and host managment (#206 - closed)