concept cleanup'
concept graph update
Merge branch 'masterDGTal' into MetricConcepts
new MetricSpace concepts (in concepts::) and doc
propagating changes
missing file and faster .travis
doc warning
Metric doc added
Concepts updates and DigitalMetricAdapter added
changelog
changelog number
fixing conflict
doxy fixes
Basic point functors and test
merge from master
fix typo doc
Fixes 773 and update doc of CountedPtr.
Update test testCountedPtr.
Fixing conflicts
Some fixes on CountedPtrxxx + doc + new test.