fix(clap): call iter() directly

As IntoIter is only implemented for slices up a sice of 32.
DFAReporting though will reach 55, at least.

Also added dfareporting-cli code to show how stackoverflow issues can be
circumvented efficiently.

gen/dfareporting2d1-cli/README.md

@@ -214,7 +214,7 @@ This documentation was generated from the *dfareporting* API at revision *201503
   dfareporting2d1 --help
 
 All documentation details can be found at
-http://byron.github.io/google-apis-rs/google_dfareporting2d1_cli/index.html
+http://byron.github.io/google-apis-rs/google_dfareporting2d1_cli
 
 Configuration:
   --scope <url>  

gen/dfareporting2d1-cli/src/cmn.rs

@@ -3,6 +3,7 @@
 use oauth2::{ApplicationSecret, ConsoleApplicationSecret, TokenStorage, Token};
 use rustc_serialize::json;
 use mime::Mime;
+use clap::{App, SubCommand};
 
 use std::fs;
 use std::env;
@@ -17,6 +18,22 @@ use std::default::Default;
 
 const FIELD_SEP: char = '.';
 
+/// Unused for now, can be used once https://github.com/kbknapp/clap-rs/issues/87
+/// is available
+pub enum UploadProtocol {
+    Simple,
+    Resumable,
+}
+
+impl AsRef<str> for UploadProtocol {
+    fn as_ref(&self) -> &str {
+        match *self {
+            UploadProtocol::Simple => "simple",
+            UploadProtocol::Resumable => "resumable",
+        }
+    }
+}
+
 #[derive(Clone, Default)]
 pub struct FieldCursor(Vec<String>);