- Renamed files task.h -> main.h, task.cpp -> main.cpp. This is to
prepare for the next rename, which addresses the OpenBSD bug.
- Removed utf8.h, utf8.cpp from Makefile.am, which were inadvertantly
added.
- Converted unit tests to use a UnitTest object, with more methods and
and exit summary.
- Removed "fail" tests in tdb.t.cpp, because it artificially reduces
the number of passing tests - the comments in the code suffice.