Update user-facing documentation for Tor Browser 4.5
We should not only update out design document for Tor Browser 4.5 (legacy/trac#15580 (moved)) but user-facing documentation as well (the new launcher for Linux comes to mind as one example).
We should not only update out design document for Tor Browser 4.5 (legacy/trac#15580 (moved)) but user-facing documentation as well (the new launcher for Linux comes to mind as one example).