Update docs to reflect changes in master (#670)

* work on updating docs to master version

* more updates

* more polishing

* finish interactivity chapter

* finish updating core guide

* fix grammer mistakes and typos

* more grammer fixes

* add liveview guide

* remove doc build

* WIP custom renderer docs

* add axum as dev-dependancy to guide

* fix examples

* fix overview example

* use md book fork to fix compilation

docs/guide/examples/hello_world_web.rs

@@ -1,10 +1,13 @@
 #![allow(non_snake_case)]
+// import the prelude to get access to the `rsx!` macro and the `Scope` and `Element` types
 use dioxus::prelude::*;
 
 fn main() {
+    // launch the web app
     dioxus_web::launch(App);
 }
 
+// create a component that renders a div with the text "Hello, world!"
 fn App(cx: Scope) -> Element {
     cx.render(rsx! {
         div {