Docs: Add requireDescriptionCompleteSentence to readme.
Docs: Add requireDescriptionCompleteSentence to readme.

Fixes #106
Closes gh-109

szarouski/jscs-jsdoc,lvivier/jscs-jsdoc,jdlrobson/jscs-jsdoc,shaoshing/jscs-jsdoc,dtracers/jscs-jsdoc,jscs-dev/jscs-jsdoc,MunGell/jscs-jsdoc