GH #575: fixed compile error if POCO_WIN32_UTF8 is not defined
regenerated sample project files, fixed a potential compile error in NetworkInterface when targetting older Windows releases
Fix parsing issue with IPv6 format: propogating scopeId from IPv6AddressImpl to IPAddress.
Merge pull request #576 from gevpa/bug_ipv6_scopeId

Fix parsing issue with IPv6 format in Poco::Net::IPAddress