Merge pull request #4 from MarkZ3/master

Position the logo at the back
Basic notice for lower is better.

TODO: add support for lower/higher metadata(when available)
Add interpolation support for cumulative graph and linear graph

Signed-off-by: Jonathan Rajotte Julien <jonathan.rajotte-julien@ericsson.com>
add url to README
Update commit URL for Trace Compass

Signed-off-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>