Regenerate gemspec for version 2.1.16
Regenerate gemspec for version 2.1.16

wchrisjohnson/kitchenplan,CraigCottingham/kitchenplan,optimizely/kitchenplan,fredguth/kitchenplan,franklouwers/kitchenplan,18thletter/kitchenplan,hedywoo/kitchenplan,fredguth/kitchenplan,zakeeruddin21/kitchenplan,franklouwers/kitchenplan,wchrisjohnson/kitchenplan,CraigCottingham/kitchenplan,brodock/kitchenplan,18thletter/kitchenplan,kitchenplan/kitchenplan,brodock/kitchenplan,hedywoo/kitchenplan,kitchenplan/kitchenplan,zakeeruddin21/kitchenplan