Creates and downloads github releases

• npm install github-release-manager

• node create-release.js <branch> <github_token> <owner> <repo>
• The contents of the /release directory will be gzipped and uploaded to a github release versioned by branch name.

• node ./node_modules/github-release-manager/download-release.js <branch> <github_token> <owner> <repo>
• The zipped release will be downloaded and unzipped to the /release directory.

• bump the version number in package.json
• run npm publish locally