Forward-declared the kvp_dbase ADT.
Defined the interface for kvp_dbase.
Defined the database adapter details.
Set up the skeletal implementation of the kvp_dbase interface.
Completed implementation of the kvp_dbase interface.
Set up skeletal implementation of SQLite database adapter.

With this skeletal implementation of SQLite, we should now be able
to build the project. We will resume implementation once we have
cleared out all build errors (if any) for the kvp_dbase implementation.
Included implementation of kvp_dbase interface in build rules.

Also fixed issues reported during the build process.
Completed implementation of SQLite adapter.
Merge branch 'feature-dbase' into develop