GRDB.swift

There are ORMs that address partial records, multi-threading troubles brought by lazy loading, uniquing, auto-updating records, and, importantly, put raw SQL on the same level as the query builder. I think of [Diesel](http://diesel.rs) and [GRDB.swift](https://github.com/groue/GRDB.swift/blob/master/Documentatio...).

I'd also like to thank the other for his attempt at raising the general awareness of transaction isolation. Even when you deal with simpler databases like SQLite, isolation is a serious topic. When serializing accesses hinders performances, dealing with the "WAL mode" that grants SQLite with single-writer-multipler-readers abilities is everything but trivial, because of the huge amount of documentation that has to be read in order to reach the desired level of isolation. I've written an SQLite library in Swift that provides by default the snapshot isolation level which grants most developers with both peace of mind, and non-blocking reads. Check out its "concurrency guide" if you're interested: https://github.com/groue/GRDB.swift/blob/master/README.md#co...