add Xsession script to launch Unity indicators
CD to a known directory before starting the test.

Fixes some failures when the daemon is run from transient directories.
use XDG autostart instead of Xsession
unconditionally run croutonversion to get RELEASE
moar unity
Merge branch 'unity-trusty' of https://github.com/smibarber/crouton
Ubantoo 14.04 Trusty Trilobite in, 12.10 Quantal Quagga out.