Update README.md

Add credits to Jonathan Pellet who help us to find an outstanding logo! Thanks again!
Merge pull request #95 from GuillaumeGomez/master

I changed the way to print / vote
Removed the trigger class. Now triggerDispatcher add routes to triggers instead of registering triggers. Internal storage is made with a map.
Basic metadata proof of concept implemented.
Merge branch 'origin/feature/Trigger-refactoring'
Implementation finished and working for framework user.
(but not working internaly for modules, see issue #94)