Add release notes for a contributions merge

* CHEF-3714 - Implement a method in Chef::Util::FileEdit that returns if a file was edited
* CHEF-4173 - "insert_line_if_no_match" in file_edit.rb fails silently
* CHEF-4680 - Avoiding raising subversion passwords in exceptions
* CHEF-1752 - Certain characters (e.g. ':') in package version numbers cause Dpkg provider to install things repeatedly.
* CHEF-4851 - Display all missing dependency cookbooks and versions when uploading cookbook