Bump to 0.4-dev

git-svn-id: http://gsoc.svn.wordpress.org/2013/rmccue/trunk@2144 f69abe3c-2ee2-4550-9a6d-17bd458115be
Add guiding principles and further notes

git-svn-id: http://gsoc.svn.wordpress.org/2013/rmccue/trunk@2145 f69abe3c-2ee2-4550-9a6d-17bd458115be