few change in the readme
last change before merge from troussil branch
merge from troussil's master
solved merge conflict
 new 'all' method in OutputSensitiveXXX and output-sensitive method added to toolDisplay
little correction
modifications on cascade in other files (tests fail)
fixed method next
merge branch with AlphaShapeBug
cmakelists files
 cleaning OutputSensitiveAlphaShape and its associated test
rebuilding algo
add comments
 fixing merge conflicts
 cleaning OutputSensitiveAlphaShape
Merge branch 'master' into AlphaShapeBugCleaningTL