milestone for app development
piechart develop
Merge branch 'master' of https://github.com/dianping/cat
app line chart success ratio show only 95-100%
modify title for tab of app
Merge pull request #474 from jialinsun/master

app spread modify, piechart implement, history comparison query2 copy query1 select value, success ration show 95-100%
Merge branch 'master' of github.com:dianping/cat