#139: Use Java system properties for http proxy (and other settings) by default. This is a regression; it used to work this way in 1.8 and prior. Thanks Thorsten Möller.
#132: The proxy was erroneously sometimes appending "?null=" to a request that had no query portion of the URL. Thanks @pjunlin.
README updates. Thanks Bruce Taylor, Gonzalo Fernández-Victorio
... TODO; I should have started this list long ago