[fix] Add twitter to Gemfile
[ref] Configure twitter at boot time; store credentials in config; move production setting to config
[add] !version
[add] Receive events from HAL
[fix] #UrLab est francophone !
[fix] Update config example
[fix] Twitter urls
Merge branch 'master' of github.com:titouanc/lechbot
[enh] Ignore events older than 120s