Finished patch support

src/app/core/data/rest-request-method.ts

@@ -0,0 +1,18 @@
+/**
+ * Represents a Request Method.
+ *
+ * I didn't reuse the RequestMethod enum in @angular/http because
+ * it uses numbers. The string values here are more clear when
+ * debugging.
+ *
+ * The ones commented out are still unsupported in the rest of the codebase
+ */
+export enum RestRequestMethod {
+  GET = 'GET',
+  POST = 'POST',
+  PUT = 'PUT',
+  DELETE = 'DELETE',
+  OPTIONS = 'OPTIONS',
+  HEAD = 'HEAD',
+  PATCH = 'PATCH'
+}