0.5.0

• Remove HideMyName provider (not works anymore)
• Fix ProxyDocker provider
• Add ProxyFetcher::Client to make interacting with proxies easier
• Add new providers (Gather Proxy & HTTP Tunnel Genius)
• Simplify connection_timeout config option to timeout
• Make User-Agent configurable
• Move all the gem exceptions under ProxyFetcher::Error base class
• Small improvements