Start new class for server side.
Basic sketch of the application.

This tries using Traceur to compile ES6 code but this does not look
perfect.
Adapt build system to transpile es6 to es5.
Add watch tasks to ease development and tasks exec.
Add custom matchers to jasmine.
Add a master task to check that whole build is ok.
Merge branch 'topic/ebaucheServeur' into develop