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

templates/instance/list.rs.html

@@ -5,7 +5,7 @@
 
 @(ctx: BaseContext, instance: Instance, instances: Vec<Instance>, page: i32, n_pages: i32)
 
-@:base(ctx, i18n!(ctx.1, "Administration of {0}"; instance.name.clone()), {}, {}, {
+@:base(ctx, i18n!(ctx.1, "Administration of {0}"; instance.name), {}, {}, {
     <h1>@i18n!(ctx.1, "Instances")</h1>
 
     @tabs(&[