[try-hubot] Add memo
[try-hubot] Add a practice script
[try-hubot] Add hubot adapter memo
[try-hubot] Add test server for a practice of hubot adapter
[try-hubot] Add simple adapter implementation for test server
[try-hubot] Remove unused script
[try-hubot] Add 'Try adapter' description to README
Merge branch 'feature/add_hubot_adapter'