Polish the docs for the Kernel functions delegated to Erlang
Polish the docs for the Kernel functions delegated to Erlang

- Fixed whitespace in some lists in the examples (now they're displayed just as
  IEx shows them)
- Added more details to a couple of functions (especially when dealing with
  errors)
- Added additional examples to make what some functions do more clear

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