add legal requests doc

legal-requests.md

+Please serve requests to:
+
+```
+Snowdrift.coop
+1021 Nottingham Rd.
+Grosse Pointe Park, MI 48230
+```
+
+You may also send a courtesy copy to legal@snowdrift.coop.
+
+Please make your requests as specific and narrow as possible, including the following information:
+
+- Full information about authority issuing the request for information
+- The name and badge/ID of the responsible agent
+- An official email address and contact phone number
+- The user, organization, repository name(s) of interest
+- The URLs of any pages, gists or files of interest
+- The description of the types of records you need
+
+Please allow at least two weeks for us to be able to look into your request.