Optimize base encode/decode about 10x
Optimize base encode/decode about 10x

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