Fixed readme

git-svn-id: https://plugins.svn.wordpress.org/pdf-light-viewer/trunk@1014197 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed readme

git-svn-id: https://plugins.svn.wordpress.org/pdf-light-viewer/trunk@1014198 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed readme 2

git-svn-id: https://plugins.svn.wordpress.org/pdf-light-viewer/trunk@1014199 b8457f37-d9ea-0310-8a92-e5e31aec5664