- ws cobra_subscribe has a new -q (quiet) option
- ws cobra_subscribe knows to and display msg stats (count and # of messages received per second)
- ws cobra_subscribe, cobra_to_statsd and cobra_to_sentry commands have a new option, --filter to restrict the events they want to receive
* Stub code for http server
* can send a response, cannot process body yet
* write headers to the response
* remove commented code
* add simple test + set default http handler
* tweak CI + unittest
* add missing file
* rewrite http::trim in a simple way
* doc