Don't skip Python testing if static library directory not found

'make check' does not require the Python static libraries to be
available. There is no easy way to find PYLIB - the directory containing
the static library especially now Debian based systems have changed to
put them in directories like /usr/lib/x86_64-linux-gnu/libpython2.7.a.
Guile tweak in CHANGES.current
Add C++ class example for Guile

Also correct other example c++ makefiles
subject/verb agreement
Merge pull request #44 from trel/patch-1

subject/verb agreement
guile: make constants example display some output similar to other languages
guile: get multimap example to run