Merge node-red v0.20.0-beta.3 into share-red repository

[h-parekh]

No description provided.

[h-parekh]

I rebased the 0.20.0.beta-3 version from node-red/dev branch over share-research/share-red repository.

It's not the cleanest rebase I've done, because:

• there were a bunch of extraneous folders that I had to cleanup from project root
• skipped some commits for dependent packages, that I added back in later

I've tested my branch with share-red-flows and was able to get a clean result.

Steps to test:

1. Clone this branch on local
2. cd
3. Run npm install. This took a while since some of the modules got built from source.
4. Start the instance node packages/node_modules/node-red/red.js --userDir . (npm start --userDir . doesn't work as expected, and reports a "missing package.json error")
5. Add the share-red-flows project
6. Test the flow

[h-parekh]

PR for this effort: #9