disallowAnonymousFunctions: Added explanations about the rule
disallowAnonymousFunctions: Added explanations about the rule

Added informations on the reason behind using this rule.

Fixes #1884
Closes gh-2037

ValYouW/node-jscs,markelog/node-jscs,hzoo/node-jscs,pm5/node-jscs,jamesreggio/node-jscs,indexzero/node-jscs,hzoo/node-jscs,SimenB/node-jscs,markelog/node-jscs,kylepaulsen/node-jscs,ficristo/node-jscs,kylepaulsen/node-jscs,SimenB/node-jscs,jscs-dev/node-jscs,kaicataldo/node-jscs,ValYouW/node-jscs,jscs-dev/node-jscs,pm5/node-jscs,kaicataldo/node-jscs,ficristo/node-jscs,indexzero/node-jscs,jamesreggio/node-jscs