elixir-mix.el v1.0.0 Release

• Feature: new function elixir-mix-test-at-point
• Fix: elixir-mix-new is now working as expected.
• Fix: elixir-mix-execute always called with command list.
• Fix: links in compilation.
• Fix: compilation handling & coloring.

Big thanks to Alexander (@sviridov ) for all the work on this release.