Tidy up README.
Tidy up README.

gfvcastro/elixir,lexmag/elixir,joshprice/elixir,kelvinst/elixir,pedrosnk/elixir,kimshrier/elixir,semahawk/elixir,antipax/elixir,beedub/elixir,semahawk/elixir,ggcampinho/elixir,michalmuskala/elixir,kelvinst/elixir,kimshrier/elixir,beedub/elixir,ggcampinho/elixir,elixir-lang/elixir,lexmag/elixir,pedrosnk/elixir,gfvcastro/elixir,antipax/elixir