Fix SQLite Problems

When you try to build the solution with the CYDIN_ON_SQLITE define enabled, it will error out. The first fixes reference mono.data.sqlite and add a missing #define to prevent these errors.

The next fix is the first step of creating users, where the create.sqlite script had some mySQL->Sqlite translation errors. But when that is done, everythiong breaks down because the DataUtil.cs usses a lot of user-defined variables in MySQL which aren't available in SQLite.

I know @garuma implemented the Sqlite support, but was it ever tested? It seems a somewhat non-trivial amount of work to get all the queries working for Sqlite as well as MySQL. I'm interested in SQLite so that I can have an easy way of backing up and moving servers to a different host if desired for dev -> production transition and any cases where we might have to upgrade the VPS it's on, depending on traffic.