Broken internal links in README.md

[aasensios]

The README.md file at the root of this project has several internal links that lead to the "404 not found" GitHub page.

Some of those links are:
settings -> https://github.com/inab/openEBench_vre/blob/master/.config/globals.inc.php
conf -> https://github.com/inab/openEBench_vre/blob/master/.config
bootstrap -> https://github.com/inab/openEBench_vre/blob/master/.config/bootstrap.php