Import atf-0.20:

Experimental version released on February 7th, 2014.

This is the first release without the code for the deprecated tools.  If
you require such code, please fetch a copy of the 0.19 release and extract
the 'tools' directory for your own consumption.

* Removed the deprecated tools.  This includes atf-config, atf-report,
  atf-run and atf-version.