PROTON-176: config.sh now modifies PERL5LIB for developers.

The build directory as well as the Perl bindings path are now added to
PERL5LIB to allow in-place running of the Perl code.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1434419 13f79535-47bb-0310-9956-ffa450edef68
PROTON-176: Fixes to Perl code due to unit test failures.

Fixes for code that failed the new unit tests.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1434420 13f79535-47bb-0310-9956-ffa450edef68
PROTON-176: Provide Perl unit tests.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1434421 13f79535-47bb-0310-9956-ffa450edef68