config.cfgrep does better job at hinting how the function works
(i.e. somehow similar to UNIX grep) and that the use is not limited to
INI files.

Also default config file suffix is now "conf".

 *  Add colors,
 *  print ffoo version,
 *  honor TF_DEBUG and TF_VERBOSE from environment,
 *  use nicer but smaller ASCII-art
 *  and include test name in subtest name.

"read strategy" is too ambiguous.  What is really happening is that we
are "merging" the (posible) files into one stream.

Now by default iniread will stop at first file; old behavior can be
restored by -j|--join switch.

Since it's normal e.g. for a dependency to import the same module as
upstream, the warning only created unnecessary noise.

As a followup to last revamp:

 *  Use more extensible test definition format,
 *  separate testing framework from setup script and split to includes,
 *  update test scripts as well as data,
 *  consolidate test output,
 *  and make some small improvements/fixes on the way.

 *  Enable running all tests via make,
 *  simplify tests (lay off data/tmpdir manipulation to framework),
 *  set rules for naming, exit statuses, etc,
 *  remove beakerlib dependency.