Merge pull request #8 from markmont/master

Fix bug that causes dbDelta() to not create tables when the tables do not exist.
PDO: Fix fatal error when the database name doesn't exists
Fix translatable string. Can't make the code nicer here.
Check first is $this->result is an object before returning the number of rows.
Fix old behaviour to return a message that it can't select the database.
Update readme and version bump.
Fix some queries returning wrong number of rows.