Refactor visitor FluidSetter
#1 Strong coupling : add allowedClass option. Useful to exclude DI container from analysis
Remove useless severity property
CS
Refactor defects messages : tag are now semantical. Renderers has to translate them into formatting tags
Add highlighted code in HTML report
Remove useless property $severity in Defect
Improve code rendering in HTML report : allow to add context to defects
Remove useless html code