Normalize IEx and ExUnit configurations
Use IO.ANSI.Docs to format mix help
Bring the multiple .iex.exs functionality
Print help when --help, -h, or /h are given on windows
Allow mix/apps configuration via ~/.mix/config.exs
Improve docs and code regarding ansi formatting
Merge pull request #2253 from bitwalker/win-iex-help

Print help when --help, -h, or /h are given on windows
Update CHANGELOG