Squashed 'packages/mr/' changes from dd134b1..1d058e7

237e0ca 0.15.1
f25370e Add changelog for v0.15.1
dc2371f Don't run previously added spec in Node
784d0e5 Add spec for dependencies with .js in, in script injection mode
d347101 Merge pull request #67 from evax/dot-js-package-load-fix
9adf492 Merge pull request #66 from Stuk/module-error
a9870a8 Add CONTRIBUTING.md
d439fdf Fix requiring an error-throwing module twice
dbfd0ee Fix javascript file location patching

git-subtree-dir: packages/mr
git-subtree-split: 1d058e72e14261ce4ac8fc6a0c4374f9b05a44c9
Update Mr to v0.15.1
Update package to v0.13.11