Depend on pysqlite2 instead of pysqlite

The pysqlite2 package provides bindings for the newer sqlite3. This
version has been used during the tests as well.

Package is available by default in the precise archive

Signed-off-by: Christoph Kassen <c.kassen@telekom.de>
Fix database configuration path

An additional / is required for proper database loading/creation. Fix
the path accordingly.

Signed-off-by: Christoph Kassen <c.kassen@telekom.de>