Merge pull request #5 from Michaaell/master

Add a list of potential warnings
Merge pull request #7 from Michaaell/master

Add roadmap
Merge pull request #8 from Michaaell/master

Add small descriptions
Added a documentation of warnings
Some additions to the warnings documentation
Change warnings management
Add W003
Add W004
Add W005
Add W007
Add W006
Improve location for W006
Add test for W001-W007
Fix warning for recurcive call
Fix a small bug with W001