- Run request handler script on Fiber and Proc #343 

- Support non-blocking sleep #343 thanks @syucream 

- Support non-blocking http[s] clients #345 thanks @pyama86 

- upgrade mruby to 1.4.1 

- Add Nginx.status_code= alias Nginx.return 

- Support return method in handler script

see also [v2 example in test](https://github.com/matsumotory/ngx_mruby/blob/master/test/conf/nginx.conf#L790-L881)

- sub_request method supports hash option for request parameters #376

- Independent mruby-httprequest for usability #372

- Use string object for sub_request params in core for performance and usability #374

- Sometimes missing fiber object from nginx pool when using sub request #373

- Remove unused variable #375 @yano3 

- Lock peers and peer. Might be a problem with "zone". #378