Add a bit more docs

README.md

@@ -4,10 +4,12 @@ A simple library for creating and consuming async streams
 
 ## Usage
 
+Add to your Cargo.toml
 ```bash
 $ cargo add streem
 ```
 
+Use in your application
 ```rust
 use streem::IntoStreamer;
 

src/from_fn.rs

@@ -1,3 +1,5 @@
+//! Types and methods for constructing streams
+
 mod type_stack;
 
 use std::{

src/streamer.rs

@@ -1,3 +1,5 @@
+//! Types and Traits for consuming Streams
+
 use std::pin::Pin;
 
 /// Enables consuming any Stream + Unpin