New test 115-load.t

* Check loading of YAML config file.

Signed-off-by: Xiong Changnian <xiong@cpan.org>
115-load.t all pass

* Creates and loads dummy.yaml

Signed-off-by: Xiong Changnian <xiong@cpan.org>
Test passes again.

* _load() now dies if it gets no configuration from file.

Signed-off-by: Xiong Changnian <xiong@cpan.org>
Merge branch 'feature-config' into devel

* Read dbname, dbuser, dbpass, dbtable from a config file.
* Provides the capacity; needs to be invoked with filename.

Signed-off-by: Xiong Changnian <xiong@cpan.org>