Brew commands

Normal install
brew install elixir 

Install github master version of Elixir
brew install elixir --HEAD

Upgrade Elixir to github master:
brew upgrade elixir --HEAD

Uninstall
brew uninstall elixir

Your best friend
brew man  

Manually install Elixir

1. Clone elixir https://github.com/elixir-lang/elixir.git
2. Check out the branch/version/hash you want to build (git co branch/hash)
3. In the elixir directory, make clean test
4. Make the version directory mkdir /usr/local/Cellar/elixir/version
5. Copy the bin and lib files to the directory 
1. cp /Users/nhu/me/elixir/elixir/bin /Users/nhu/me/elixir/elixir/lib CHANGELOG.md LICENSE README.md  /usr/local/Cellar/elixir/1.0.0
2. Brew install elixir
3. Brew switch 1.0.0