thorium: add support for Travis CI building

Signed-off-by: George K. Thiruvathukal <thiruvathukal@gmail.com>
thorium: correct missing ./scripts path in Travis pre-install script

Signed-off-by: George K. Thiruvathukal <thiruvathukal@gmail.com>
thorium: update README to reflect that the build and test status

Signed-off-by: George K. Thiruvathukal <thiruvathukal@gmail.com>