Removed unused Proxy plugin
Removed the proxy plugin example and moved them to the proxy plugin itself
Merge pull request #296 from crawljax/fixes/remove-proxy-example

Removed the proxy plugin example
Merge pull request #282 from crawljax/clean-up

Removed unused Proxy plugin
Fixed broken reference to proxy plugin
applying suggestions and corrections from the feedback for the pull request
Merge remote-tracking branch 'upstream/master'