adjusts color of nav for subfactors and partials info that describes each factor for fancybox

Uses fancybox and static partials to serve detailed info about each PG factor based on params[:factor], which is part of the url but also uses includes? to guard against injection.
adds partial for all 6 factors
adds about info within survey

Describes how survey benefits educators and how it should be used. Defines 6 factors and alerts educators about the purpose of the nav below.