If an error is encountered reading/writing in a response, close connection
Merge branch 'fix-response-writer' of github.com:isaldana/falcore into fix-response-writer
cleanup handlerWriteResponse.  also capture errors from Flush
Merge remote-tracking branch 'dgrijalva/fix-response-writer' into fix-response-writer
Added test for server.handlerWriteResponse
cleaned up upstream_throttle_test to use channels instead of sleep.  much faster
Merge branch 'fix-response-writer'