Updated help text and README

git-svn-id: https://plugins.svn.wordpress.org/exxica-social-marketing/trunk@1023925 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated help README

git-svn-id: https://plugins.svn.wordpress.org/exxica-social-marketing/trunk@1023937 b8457f37-d9ea-0310-8a92-e5e31aec5664