Merge pull request #297 from marsqing/master

session service prototype
Merge branch 'master' of github.com:dianping/phoenix
Merge pull request #298 from marsqing/master

support write record to file
add phoenix-filter and request-id-hanlder phoenix-environment
temporary save
Merge branch 'master' of github.com:dianping/phoenix
Merge branch 'master' of github.com:qmwu2000/phoenix
refactor to component
support multi threads to process RequestEvent