CppUnit - C++ port of JUnit Code

Check for isfinite() and finite().

New autoconf macro to test for isfinite() in C++ mode.

Update email address of Steve M. Robbins

Arrange class initializers in correct order.

Ensure virtual class has virtual destructor.

Put a C++ statement in the first argument of CPPUNIT_ASSERT_THROW()
and CPPUNIT_ASSERT_NO_THROW().

Fix examples/hierarchy to actually return the result of the tests.
It is expected to fail, so mark it using XFAIL_TESTS in Makefile.am.

Do not fail dist-hook if $(distdir)/lib exists.

Add cppunit.pc

Add quotes around autoconf macro name, BB_ENABLE_DOXYGEN.