fix #306. display avatar icon to notification
fix #308. sort login list by having avatar.
remove unneed console.log
add hubot avatar icon
improve logic for parsing a image extension
replace '\n' to <br> in chat message
allow display multiple notification
Hubot、連携系の記述を追加

その他もろもろ細かい所を修正
fix #310. show notification when blog is added.
adjust stylesheet like github.
adjust stylesheet of blog like github.
fix #250. change the input form to textarea of chat message in order to be able to enter multi line.
fix #250. for windows browser
一部のバージョの Chrome で宛先文字の前にフォーカスが来てしまう現象を修正。
宛先入力時の前後のスペースを最小限に調整
fix #311. change font style of blog form to monospaced font.
change blog index style
adjust blog index
adjust color of blog index.
adjust blog index style