Update site with pending information about Request #1

1. Home
1.1. Quick examples so the user can choose which approach to take:
1.1.1. Request with callbacks
1.1.2. Request-Promise with promises
1.1.3. Request with streams
2. Use Cases similar to those in the Request-Promise cheat sheet
2.1. Common use cases with callback-based and promise-based code maybe side by side
2.2. Streaming use cases
3. Documentation
3.1 Full API documentation in the style of the current Request README
4. Support / Contribute
4.1. Link to Gitter chat
4.2. Link to repos, contribution guidelines
4.3. Link to Request architecture docs etc.