Remove stray Composer experiment file

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48862 b456876b-0849-0410-b77d-98878d47e9d5
fixing some links as per http://dev.tiki.org/How+to+release#Review_all_external_links

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48863 b456876b-0849-0410-b77d-98878d47e9d5