Support custom PyPI repositories
Merge pull request #292 from sivel/custom-pypi

Support custom PyPI repositories
Add the ability to restrict publish plugins to a specific branch
Merge pull request #291 from sivel/restrict-publish-branch

Add the ability to restrict publish plugins to a specific branch
support publishing to npm
update npm login method
correct npm publish logic
Merge pull request #300 from shawnzhu/publish-npm

Publish plugin - npm