We (by which I mean Petar Penkovv) have been doing some work with plugins that
are built for testing, rather than general use or for being coding examples.
Ultimately we want to integrate them into a testing framework to be able to
more fully test ATS. This means putting the code in the source tree but there
has been some dissent about where to put them. I am strongly of the opinion
these should be separated from the other plugins to avoid confusing people. The
current suggestion is to put them in "tests/plugins" which I think is
reasonable.
