Stubbed content handler tests
Create proper create struct
Create usable type and type group
Saner content location ahndling in schema
Tested & Implemented Section ahndler
Removed unused methods

Constraint ensured by foreign keys
Fail on updating non existing group
Implemented: Return real section
Implemented: Inserting content and version
Implemented: Calling mapper and gateway for content creation
Implemented first mapper methods
Small test fixes
Removed content name table, small schema fixes
Removed field handler
Added: Abstract field id generator
Created temporary random field ID generator
Use field ID generator
Removed debug statement
Remvoed field table again

Will be replaced by a pure sequence table later
Removed a bunch of unused methods