Revert "Remove bin temporarily"

This reverts commit 26cfd55f4f1401251ff6c6655e4049860e8f7a96.
Remove grunt-cli dependency
remove unused Makefile
Restore build command

The commented issue appears to be resolved and the build task appears
to work again.
Changelog & transition
Merge branch 'build-task' of https://github.com/kpdecker/es6-module-transpiler into kpdecker-build-task
remove npm build
v0.3.0
fix travis-ci
Add Travis image to readme
Document CoffeeScript changes
Merge pull request #61 from kpdecker/fix-default-name

Use default key rather than __default__ for import
Merge branch 'master' into legacy-exports