v1.0.0-rc.1

Lots of documentation added. Module Directives, Simple Style, and Control Flow are fleshed out. Pipes, Configs, and the manifesto prelude to control flow all need work still.

New Styles

• Enum.into(x, []) => Enum.to_list(x)
• Enum.into(x, [], mapper) => Enum.map(x, mapper)
• a |> Enum.map(m) |> Enum.join() to map_join(a, m). we already did this for join/2, but missed the case for join/1