The latest release of the open-source Extension Library applies only to Notes/Domino versions up through 9.0.1FP9. Newer releases of Notes and Domino include newer versions of the Extension Library built-in, but those changes are not reflected in the downloads available here.
Though installing these versions on newer Domino releases shouldn't cause problems, doing so will also not provide any advantages.
The latest documentation is in the wiki.
XPages Goes Responsive Part 2
XPages Goes Responsive Part 1
Relational Database Support
REST Services for Domino and XPages