Merge pull request #175 from ainilife/biz

new tests into cat
fix cat issue include error handle ip forward in filter
romove unused code
rename the remote ip name
Merge pull request #185 from youyong205/biz

Biz
add maven plugin for cat
Merge branch 'biz' of https://github.com/dianping/cat into biz
add jetty mvn plugin into cat-home
fix two bugs for NPE