Added small animation on title for capturing attention on 3.0.0 release

Simple CSS animation that should work fine on all recent browser.
prepared website for 3.0.0 release (nightly page update will come in the next few days)

* fixed links in doc splash screen

* Added blog for 3.0.0 final
Replaced video in the homepage with "Video Coming Soon" image
Merge pull request #29 from scala-ide/staging/release-3.0.0

Staging/release 3.0.0