WIP

To manually test plugin on a fresh intellij installation, run sbt pluginRun. I recommend you "Create new project", it doesn't have to be an sbt project, just a scala project. Create an empty file foo.amm, the extension needs to be .amm in order to not conflict with .sc. Hopefully, we can use .sc sometime later.

Most of build.sbt was adopted from here: https://github.com/psliwa/idea-composer-plugin.