Merge pull request #321 from youyong205/master

merge exception function
top出错排序调整，排序次序为红、黄、白，没种色内部再按出错数排序
code cleanj
Merge branch 'master' of https://github.com/dianping/cat
modify the pie chart default size
Merge pull request #322 from jialinsun/master

top出错排序调整，排序次序为红、黄、白，每种色内部再按出错数排序
Merge branch 'master' of github.com:dianping/cat
modify the problem pie chart