Add i interface of HttpHandler and HttpServer
Merge pull request #59 from chen3feng/develop

Develop
Merge branch 'master' into http-server
Merge branch 'master' of https://github.com/chen3feng/toft into http-server
Merge branch 'master' of https://github.com/chen3feng/toft into http-server
Add event_dispatcher
cpplint
http server working on
Merge branch 'master' into http-server
Fix bug of infinite notify when client closed.
Merge branch 'master' into http-server
Merge branch 'master' into http-server
Merge branch 'develop' into http-server
Merge branch 'master' into http-server
add uuid, add include path for benchmark.h
add empty new line for BUILD
fix comments of chen3feng
add empty line at file end
add empty line at file end
cpplint all