Add outside_collaborators list

src/main/java/org/kohsuke/github/GHOrganization.java

@@ -315,6 +315,17 @@ public PagedIterable<GHUser> listPublicMembers() throws IOException {
         return listMembers("public_members");
     }
 
+    /**
+     * All the outside collaborators of this organization.
+     *
+     * @return the paged iterable
+     * @throws IOException
+     *             the io exception
+     */
+    public PagedIterable<GHUser> listOutsideCollaborators() throws IOException {
+        return listMembers("outside_collaborators");
+    }
+
     private PagedIterable<GHUser> listMembers(String suffix) throws IOException {
         return listMembers(suffix, null, null);
     }
@@ -332,6 +343,19 @@ public PagedIterable<GHUser> listMembersWithFilter(String filter) throws IOExcep
         return listMembers("members", filter, null);
     }
 
+    /**
+     * List outside collaborators with filter paged iterable.
+     *
+     * @param filter
+     *            the filter
+     * @return the paged iterable
+     * @throws IOException
+     *             the io exception
+     */
+    public PagedIterable<GHUser> listOutsideCollaboratorsWithFilter(String filter) throws IOException {
+        return listMembers("outside_collaborators", filter, null);
+    }
+
     /**
      * List members with specified role paged iterable.
      *