message: Make README clearer
diff: +# Introduction
  +
  +Ion is a modern system shell that features a simple, yet powerful, syntax. It is written entirely
  +in Rust, which greatly increases the overall quality and security of the shell, eliminating the
  +possibilities of a [ShellShock](http://www.wikiwand.com/en/Shellshock_(software_bug))-like vulnerability
  +, and making development easier. It also offers a level of performance that exceeds that of Dash,
  +when taking advantage of Ion's features. While it is developed alongside, and primarily for, RedoxOS,
  +it is a fully capable on other \*nix platforms.
  +
  # Ion Shell
  [![Build Status](https://travis-ci.org/redox-os/ion.svg)](https://travis-ci.org/redox-os/ion)
  @@ -74,15 +83,6 @@ In addition to the chatroom, there's a [thread in the Redox forums](https://disc
  that can be used for discussions relating to Ion and Ion shell development. These are mostly served
  by the GitHub issue board, but general discussions can take place there instead.
  -# Introduction
  -
  -Ion is a modern system shell that features a simple, yet powerful, syntax. It is written entirely
  -in Rust, which greatly increases the overall quality and security of the shell, eliminating the
  -possibilities of a [ShellShock](http://www.wikiwand.com/en/Shellshock_(software_bug))-like vulnerability
  -, and making development easier. It also offers a level of performance that exceeds that of Dash,
  -when taking advantage of Ion's features. While it is developed alongside, and primarily for, RedoxOS,
  -it is a fully capable on other \*nix platforms.
  -
  ## Why Not Windows Support?
  Windows is not, and may never be supported due to certain limitations in the NT kernel. Namely,
  