* add support to use module filename as listener (#820)

* 0.8.235

* better log

* 0.8.236

* enable Wechaty.on() use relative filename as listener

* 0.8.237

* 0.8.238

* remove unused Loggable

* Hot Module Replacement (HMR) support powered by hot-import (#820)

* 0.8.239