Stable release can be installed on Eclipse 3.8 as well

Also fixed broken link to FAQ in the nightly page.
Removed 'Update Site' from titles in the Nightly page
Cleans up the download/nightly page

It points to currently only available build: 4.0.x on 2.10.2-SNAPSHOT
Adds a SDK download page
Puts a screenshot on the sdk download page
Adds back the 3.0.x nightlies
Release notes for 0.2.0
Revert "Release notes for 0.2.0"

For some strange reason, after committing SHA:
12e51f9ad017a897924b5b85fd29e8b62069869d, the website's CSS seems to not be
displayed anymore. I'm reverting this commit to understand if the fact is
coincidental or not.

This reverts commit 12e51f9ad017a897924b5b85fd29e8b62069869d.
Attempt to fix the lack of CSS
Revert "Revert "Release notes for 0.2.0""

Let's bring back the Play2 0.2.0 announcement.

This reverts commit 47c8639d64357604a0aea349a56b405d9abf341e.
Changed date of announcement and added name of missing contributor
Fixes typo
Updated information about Jekyll in README