Provide some metrics in Debile

Description of the project: Because everybody loves meaningless stats, the goal of this project is to extend the debile infrastructure to provide some metrics on the packages. For example, build time, size of the binaries, etc.

This projects would also extend to propose graphics over time (number of failure, number of errors/warnings detected, etc).

Graphics should be provided using the d3js or Kibana library

debile is a platform which aims to provide a generic rebuild platform. Normal build, custom builds (clang based) or static analyzers (coccinelle, scan-build, etc) are managed through this infrastructure.