[Merge] lp:~jimmy-sigint/mailman/restapi_additional_attributes into lp:mailman

Jimmy Bergman has proposed merging lp:~jimmy-sigint/mailman/restapi_additional_attributes into lp:mailman. Requested reviews: Mailman Coders (mailman-coders) Related bugs: #659951 REST server should support a few more writable attributes to simplify integration https://bugs.launchpad.net/bugs/659951 -- https://code.launchpad.net/~jimmy-sigint/mailman/restapi_additional_attribut... Your team Mailman Coders is requested to review the proposed merge of lp:~jimmy-sigint/mailman/restapi_additional_attributes into lp:mailman.