Update compiler (#725)

* update compiler to recent nightly

* cargo fmt

* fix clippy

but ructe code is still complaining

* update circleci and rocket_csrf

* fix last clippy problems

* cargo fmt

* fix build issue

was caused be improper handling of recursive template (comment) by old ructe, which is fixed on newer version

src/routes/user.rs

@@ -355,7 +355,7 @@ pub fn edit(name: String, user: User, rockets: PlumeRocket) -> Result<Ructe, Err
             ValidationErrors::default()
         )))
     } else {
-        Err(Error::Unauthorized)?
+        Err(Error::Unauthorized.into())
     }
 }