Reverse dependencies for constants

Latest version of the following gems require constants

Gem	Version	Date	Downloads
bahuvrihi-molecules +14.3 Thousand Downloads	`0.2.0` August 11, 2014	August 11, 2014	14.3 Thousand
molecules +13.5 Thousand Downloads	`0.2.0` May 06, 2009	May 06, 2009	13.5 Thousand
ms-xcalibur +13.2 Thousand Downloads	`0.3.0` May 25, 2009	May 25, 2009	13.2 Thousand
bahuvrihi-ms-xcalibur +7.72 Thousand Downloads	`0.1.0` August 11, 2014	August 11, 2014	7.72 Thousand
bahuvrihi-xcalibur +4.5 Thousand Downloads	`0.0.1` August 11, 2014	August 11, 2014	4.5 Thousand
bahuvrihi-biomass-xcalibur +4.45 Thousand Downloads	`0.0.1` August 11, 2014	August 11, 2014	4.45 Thousand