Output all run.sh noise to stderr so that stdout is free.
Add tmpfile, passes, and fails commands to the test framework.
Fix enter-chroot -b error handling; resolves #439.
Add background tests.
Merge pull request #455 from drinkcat/set_e

Add `set -e` to all host scripts. Fixes #392.
Merge pull request #449 from drinkcat/edit-chroot-disablehungtask

Disable hung task timeout in edit-chroot as well.
Fetch appropriate version of libsbc1 to prevent breakage during release upgrade.
Remove xserver-xephyr apt preference file on Ubuntu >quantal.
Add trusty (14.04) to Ubuntu release list.
Add test script for Ubuntu updates from precise to trusty (via non-LTS releases).
Fix libsbc1 version in Debian wheezy (use backport).
Pass $TESTLOG variable to test scripts, to allow output to secondary log files.
Fixes after review.