Removed WGI_RESPONSE.write (..)

Replaced any internal call to WGI_RESPONSE.write () by the associated implementation (i.e  output.put_string (...)  )
Added WGI_OUTPUT_STREAM.put_crlf

Renamed WSF_RESPONSE.put_response (a_message) as  `send (a_message)'
WSF_RESPONSE_MESSAGE.send_to (res)  is now exported only to WSF_RESPONSE

library/server/ewsgi/specification/response/wgi_response.e

@@ -42,14 +42,6 @@ feature -- Status report
 		deferred
 		end
 
-feature {WGI_RESPONSE} -- Core output operation
-
-	write (s: READABLE_STRING_8)
-			-- Send the string `s'
-			-- this can be used for header and body
-		deferred
-		end
-
 feature -- Status setting
 
 	status_is_set: BOOLEAN