Add comments and pragma marks
Import needed headers
Scheme should be shared to support CI build
Add a basic OPFQuery object
Amend query model to support is-queries and root-queries
Add ability to set query limit
Change some signatures and implement query fetching
Add specs to test record fetching
Refactor sql code into base and main
Implement IN-query
Test AND-clauses
Add specs for IN-query
No need to keep reference
Implement and test LIKE-query
Add comments
Change method signatures
Add parsing callbacks to model and query
Add specs
Change author_id to NSNumber to handle nulls gracefully
Add a spec for questions