added 2.2 to changelog in readme.txt

git-svn-id: https://plugins.svn.wordpress.org/svg-vector-icon-plugin/trunk@840026 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix spelling error <= need more sleep

git-svn-id: https://plugins.svn.wordpress.org/svg-vector-icon-plugin/trunk@840027 b8457f37-d9ea-0310-8a92-e5e31aec5664
finalize readme.txt spacing 

git-svn-id: https://plugins.svn.wordpress.org/svg-vector-icon-plugin/trunk@840029 b8457f37-d9ea-0310-8a92-e5e31aec5664