Initial changes to the website

Give a better sense of what camlistore is right away
More readable headings on those yellow bars
Reduce number of items in the nav
Add detail to download and getting started section
Turned mailing list page into community page
Style changes to the front page from aaron.
Reworked the code page
Added some pages to fill in, protocol and todo
Reorganized docs page
Redirect lists to new community page

Change-Id: I4e953e53618b93420f9f57aaf48d2d3651977b57
website: update redirects

Change-Id: I5ddfe0b018bcaed276521182cab8b3c977757ae9