Add a data container into WebProfiler
Add a data container into WebProfiler

Data container is reseted when a request start

nicolas-brousse/rack-webprofiler,nicolas-brousse/rack-webprofiler,rack-webprofiler/rack-webprofiler,nicolas-brousse/rack-webprofiler,rack-webprofiler/rack-webprofiler,rack-webprofiler/rack-webprofiler