Origin/Source/Service Management

[state-hiu]

• [x] Create new source from origin (auto fill relevant fields).
• [x] Create new services from source (auto fill relevant fields).
• [ ] Datetime created field for Tile origins, source, and services (so you can see what was created recently).
• [ ] Last datetime accessed for tile origin, source, and services
• [ ] Cache tile service config in memory
• [x] Cache source config in memory
• [x] Cache origin config in memory