Proxy Searcher 4.1 Released

That release fixes defects without adding new features.

What's new?
1. Fixed defect related to country detection, in case of big concurrency country was detected wrong.
2. InternetExplorer proxy client throws NullReferenceException. Tracking code was added in order to understand what's going there.
3. Fixed defect related to determining socks proxy type which was introduce in previous release.