Update docs

README.md

@@ -9,7 +9,10 @@ Module initialization/teardown functions for Rust (like `__attribute__((construc
 This library currently requires **Rust > 1.31.0** at a minimum for the
 procedural macro support.
 
-Idea inspired by [this code](https://github.com/neon-bindings/neon/blob/2277e943a619579c144c1da543874f4a7ec39879/src/lib.rs#L42) in the Neon project.
+## Zero Dependency
+
+As of `ctor 0.3.0+`, `ctor` has no dependencies. The proc macro in this crate
+inlines a helper declarative macro that does the majority of the work.
 
 ## Support
 
@@ -108,3 +111,7 @@ The `#[dtor]` macro effectively creates a constructor that calls `libc::atexit`
         libc::atexit(dtor);
     }
 ```
+
+## Inspiration
+
+Idea inspired by [this code](https://github.com/neon-bindings/neon/blob/2277e943a619579c144c1da543874f4a7ec39879/src/lib.rs#L42) in the Neon project.

codegen/README.md

@@ -0,0 +1,4 @@
+# ctor codegen
+
+This project does the codegen to ensure that ctor builds without dependencies. We use
+the `quote!` macro to generate a `TokenStream`, and then dump that into a source file.