Update studio landing page and add all-new install flow docs. bug: 27850063 (update system reqs for 2.0) bug: 27725026 (update download page for 2.0) bug: 23908299 (clean up download and get started) am: 9577d31
am: fc35cf2

* commit 'fc35cf2ce40f8c018feed67c785311f3374b577e':

Change-Id: Ia27e189a7d3c772d753fb25acab29010302527b1