* Moved http client initialization logic in ProxyServlet to new method
createClient(), in order to allow developers to customize the client
parameters according to their needs when deriving from ProxyServlet
class
* Fixed issue with rewriting encoded-URLs (with special/non-ASCII
characters)
* Added unit test for validating above bugfix, and new method to compute
URL-encoded servlet URI
Minor improvements on comments
Merge pull request #14 from cdanger/master

Http client parameters cutomization and support of encoded URLs (percent encodings)