This commit provides a unified API for performing SQLite3 queries.
Queries that return rows store their resulting data in a libucl object
tree.

Using libucl enables us to do some pretty powerful things, like convert
a SQLite3 database to JSON as one example. We can construct complex
object trees, clone objects, etc.

Not all data types are supported--only the ones I myself need right this
very moment. A more complete data type support will follow later as the
need arises.

Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>