Update README file

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Use depacked file in sample mixer API tests

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update xmp_test_module API test

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Add travis-ci control file

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>