update readme

Author: techgaun

README.md

@@ -1,19 +1,8 @@
 # WmTweeter
 
-**TODO: Add description**
+> A webmachine example in Elixir
 
-## Installation
-
-If [available in Hex](https://hex.pm/docs/publish), the package can be installed
-by adding `wm_tweeter` to your list of dependencies in `mix.exs`:
-
-```elixir
-def deps do
-  [{:wm_tweeter, "~> 0.1.0"}]
-end
-```
-
-Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
-and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
-be found at [https://hexdocs.pm/wm_tweeter](https://hexdocs.pm/wm_tweeter).
+- `mix deps.get`
+- `mix run --no-halt`
 
+You can read the [full tutorial](http://seancribbs.com/tech/2016/07/07/webmachine-elixir-tutorial-1/) by Sean Cribbs.