Added README & updated name.

README.md

@@ -0,0 +1,39 @@
+# Rust Dist Cloud Native Buildpack
+
+The Rust Dist CNB provides the Rust stand-alone distribution. The buildpack
+installs the Rust stand-alone distribution onto the $PATH which makes it available for
+subsequent buildpacks. These buildpacks can then use that distribution to build
+Rust projects. The Rust Cargo CNB is an example of a buildpack that utilizes the Rust
+build tools.
+
+## Integration
+
+The Rust Dist CNB provides Rust as a dependency. Downstream buildpacks, like
+[Rust Cargo CNB](https://github.com/dmikusa/rust-cargo-cnb) can require the rust
+dependency by generating a [Build Plan
+TOML](https://github.com/buildpacks/spec/blob/master/buildpack.md#build-plan-toml)
+file that looks like the following:
+
+```toml
+[[requires]]
+
+  # The name of the Rust dependency is "rust". This value is considered
+  # part of the public API for the buildpack and will not change without a plan
+  # for deprecation.
+  name = "rust"
+
+  # The version of the Rust dependency is not required. In the case it
+  # is not specified, the buildpack will provide the latest stable version, 
+  # which can be seen in the buildpack.toml file.
+  version = "1.43.1"
+```
+
+## Usage
+
+To package this buildpack for consumption:
+
+```bash
+$ ./scripts/package.sh
+```
+
+This builds the buildpack's Go source using GOOS=linux by default. You can supply another value as the first argument to package.sh.

buildpack.toml

@@ -2,7 +2,7 @@ api = "0.2"
 
 [buildpack]
   id = "com.mikusa.rust-dist"
-  name = "Rust Install Build Pack"
+  name = "Rust Distribution Build Pack"
   version = "0.0.1"
   homepage = "https://github.com/dmikusa/rust-dist-cnb"