v0.11.2

Enhancements

• [Mix] Add mix iex that redirects users to the proper iex -S mix command
• [Mix] Support build_per_environment: true in project configuration that manages a separete build per environment, useful when you have per-environment behaviour/compilation

Backwards incompatible changes

• [Mix] Mix now compiles files to _build. Projects should update just fine, however documentation and books may want to update to the latest information