add AdvancedProxyHandler
refine AdvancedProxyHandler
add ProxyChainMixin
refine AdvancedProxyHandler
bugfix for AdvancedProxyHandler
add GAEProxyHandler2
add SimpleProxyHandlerFilter
refine SimpleProxyHandlerFilter
refine SimpleProxyHandlerFilter
add ForceHttpsFilter/GAEFetchFilter
add DirectRegionFilter
add WithGAEFilter/FakeHttpsFilter
refine SimpleProxyHandler
add HostsFilter placeholder
refine HostsFilter
port PACProxyHandler to SimpleProxyHandler
shorten FORWARD/URLFETCH/STRIPSSL/MOCK
add GreenForwardMixin for uvent socket forward
refine GAEFetchFilter and add PHPProxyHandler2
refine PHPProxyHandler2