First checkin for new page design

This pull request contains the first set of changes for the new page design. Here is a summary:
- created a new index page: index-new.html
- added the standard header, footer, and content of the page including featured repos and all repos in the Microsoft organization
- also added links to all other Microsoft organizations.
- the list of all repos is obtained by making a direct REST API request to github.
- the list of featured repos and all other organizations is obtained from featured.json and organization.json files checked into the repo
- the basic functionality and layout of the page is implemented.

Next steps:
- CSS improvements
- update the list of organizations