Add hokuhoku

- FIXME: リプライじゃなくてエアリプライ（普通のTweet）の方がヨサソウなんだけどやり方がわからない( ˘ω˘)
Add 承認
Merge pull request #6 from taea/hokuhoku

ﾎｸﾎｸしたさ ( ˘ω˘)
Fix method name
Add Response#reply_without_mention
Bump version
Tweak lol handler
Tweak suddenly_death
Bump version
Add TwitterUtil
Add ghost handler
Bump version
Tweak ghost handler
Bump version
Fix echo handler
Add tori command
Merge pull request #8 from fukayatsu/tori-command

Add tori command
Bump version
Add route for yah-yah
Bump version