Renamed EWSGI_RESPONSE as EWSGI_RESPONSE_STREAM to avoid confusion with EWSGI_RESPONSE as stated in Paul's proposal
Added default "configuration" (for nino and cgi) to be independant of the connector (at compilation time)
Added example implementing Paul's proposal on top of EWSGI
So this is really more flexible this way, and much easier to write application supporting CGI, FCGI, Nino and so on .. as demonstrated in hello_world
This is a first version, more will come later, mainly migrating from Eiffel Web Reloaded to this Eiffel Web Framework project.