Add FAQ

git-svn-id: https://plugins.svn.wordpress.org/evergreen-post-tweeter/trunk@935771 b8457f37-d9ea-0310-8a92-e5e31aec5664
Revision on evergreen.php

git-svn-id: https://plugins.svn.wordpress.org/evergreen-post-tweeter/trunk@935773 b8457f37-d9ea-0310-8a92-e5e31aec5664