versioninfo: Use '3.2.0-dev' as non-released development version.
project: Remove obsolete 'COPYING' file from project.
project: Removed trailing '/' from include path entry.
fixes gh-8: Code now does not depend on destroyed signal anymore.

The new implementation now makes sure a 'ZMQContext' instance unregisters itself from its 'ZMQContext' as soon as it is deleted by calling 'ZMQContext::unregisterSocket' method within the destructor. So the problem described in issue gh-8 should be resolved, too.
gh-8,changelog: Update.
merge: Merged with 'master'.