Reverse dependencies for mv-core

Latest version of the following gems require mv-core

Gem	Version	Date	Downloads
mv-postgresql +52.6 Thousand Downloads	`3.0.0` December 31, 2016	December 31, 2016	52.6 Thousand
mv-mysql +40.1 Thousand Downloads	`3.0.0` December 31, 2016	December 31, 2016	40.1 Thousand
mv-sqlite +39.4 Thousand Downloads	`3.0.0` December 31, 2016	December 31, 2016	39.4 Thousand