completed faceIsVisible
UPDATE new functionalities for vect class
Merge branch 'master' of https://github.com/ExayDX/IMN430Tp3
Merge pull request #1 from FrancoisBelanger/master

Conflict graph
Fixed faceIsVisible
intermediate commit for pulling
UPDATE ignore !
Merge https://github.com/ExayDX/IMN430Tp3
re-enabled the conflict graph init
lots of bugfix
added display
for the rest look at the log...
all work done with alex