Merge pull request #4 from nateberkopec/docs

Update README to use latest Heroku buildpacks commands

README.md

@@ -3,13 +3,6 @@
 I am a Heroku buildpack that installs
 [jemalloc](http://www.canonware.com/jemalloc/) into a dyno slug.
 
-When used with
-[heroku-buildpack-multi](https://github.com/ddollar/heroku-buildpack-multi),
-I enable subsequent buildpacks / steps to link to this library.  (You'll
-need to use the `build-env` branch of [@mojodna's
-fork](https://github.com/mojodna/heroku-buildpack-multi/tree/build-env) for the
-build environment (`CPATH`, `LIBRARY_PATH`, etc.) to be set correctly.)
-
 ## Using
 
 To use jemalloc with your app, either prefix commands with `jemalloc.sh <cmd>`
@@ -18,32 +11,10 @@ environment (it will then apply to all commands run).
 
 ### Composed
 
-You'll almost certainly want to use this in conjunction with one or more
-additional buildpack.
-
-When creating a new Heroku app:
+[Heroku now supports using multiple buildpacks for an app](https://devcenter.heroku.com/articles/using-multiple-buildpacks-for-an-app).
 
 ```bash
-heroku apps:create -b https://github.com/ddollar/heroku-buildpack-multi.git
-
-cat << EOF > .buildpacks
-https://github.com/mojodna/heroku-buildpack-jemalloc.git
-https://github.com/heroku/heroku-buildpack-nodejs.git
-EOF
-
-git push heroku master
-```
-
-When modifying an existing Heroku app:
-
-```bash
-heroku config:set BUILDPACK_URL=https://github.com/ddollar/heroku-buildpack-multi.git
-
-cat << EOF > .buildpacks
-https://github.com/mojodna/heroku-buildpack-jemalloc.git
-https://github.com/heroku/heroku-buildpack-nodejs.git
-EOF
-
+heroku buildpacks:add --index 1 https://github.com/mojodna/heroku-buildpack-jemalloc.git
 git push heroku master
 ```