fbsql: Clean client-libraries for Firebird and Interbase databases

I’ve written this quite some time ago (and it didn’t receive much love since then, but it’s functional and should be bug-free), but I just noticed I haven’t mentioned it on my blog: fbsql is a clean C-API that can be used to create bindings for other languages (such as Python or Ruby). It’s much simpler to use than the raw Interbase/Firebird API and it uses IBPP internally. So it’s basically just forwarding the function calls to IBPP and abstracting the IBPP classes to a C interface that is straight forward and intuitive.