Add development news blog post
Merge pull request #79 from huitseeker/blog/scala_installations_update

Add development news blog post
Don't put columns in the header !
Added Google Analytics tracking code for outbound links.

This allows us to know what versions are downloaded. Re-organized a bit
our links to reduce repetition.
Merge pull request #80 from dragos/analytics/add-download-tracking-code

Added Google Analytics tracking code for outbound links.
Release notes for 4.0
Prepare the website for release.