Add example of Bitwise in guards
Add example of Bitwise in guards

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