renamed ENVIRONMENT_NAMES into META_NAMES
better usage of READABLE_STRING_GENERAL, and other strings
abstract RESPONSE_BUFFER in implementation of EWSGI
for the implementation, inheriting from deferred specification (more to come later)
Re-adapt the Spec-compliant solution (instead of Lib-compliant solution).
Thus no more 100% deferred interface.
Rename EWSGI_RESPONSE into EWSGI_RESPONSE_BUFFER
Added in extra/response-as-result/ an copy/paste from the implementation of Paul's proposal (not up to date with Paul's spec). But this is mainly for information and tests.
Removed part of the ewsgi/specification interfaces ... to be able to test EWSGI compliant library against the pure specification (experimental).
Renamed most of the GW_... into EWSGI_...
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
