Merge pull request #36 from sbilly/develop

fix issue #34
Fix setup bug
Writing tests for #34
Support creatting/showing QRCode
Fix issue #37
Fix issue #37
Fix test suits
Update tests
Reorganize tests
Add ``werobot.logger``
Merge branch 'develop' of https://github.com/whtsky/WeRoBot into develop

Conflicts:
	werobot/reply.py
	werobot/utils.py