Implements ticket:3 and fixes ticket:42. The common functionality of

Implements ticket:3 and fixes ticket:42.  The common functionality of
run_tests.in for Python QA has been extracted into run_tests.sh in the
top-level and the individual run_tests just invoke that with the right
path parameters.  Also fixed Cygwin 'make check' bug by adding fix by
Don Ward.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3440 221aa14e-8319-0410-a670-987f0aec2ac5