v0.07

Bugfix: Error handling for when buffer_size isn't set when resuming the body_reader.
Bugfix: Spaces now properly encoded in proxied URIs
Bugfix: A missing path now properly defaults to "/". Thanks @membphis
Bugfix: proxy_response now checks the result of ngx.print, and breaks the loop on error. Thanks @vovapi
Docs: Example code didn't require the module. Thanks @zweite