Fix response writting detection
Merge remote-tracking branch 'upstream/master'

Conflicts:
	response_writer.go
Checking if status == 0
Fix (and test) interceptor chain execution
Merge remote-tracking branch 'upstream/master'

Conflicts:
	mux.go
	response_writer.go
Merge branch 'master' of github.com:gustavo-hms/handy

Conflicts:
	mux.go
Merge pull request #18 from gustavo-hms/master

Fix interceptor chain slicing after an error on a Before call
Merge remote-tracking branch 'upstream/master'