DSlSubsegment
retrieve files
add test
petits tests
Merge branch 'TestLSB' into DSLsubsegment
modifs tests
add test files
ArithDSS iterator
correction minor bugs
enhance test file
merge masterDGtal resolve conflicts
minor modifs
DSL subsegment test for 4-connected DSL added in the test file
minor modif in test file
add template parameter for slope and intercept number type
minor modif
nearly works with floating points: still a precision problem in intersection method
comparison ok for decimal numbers with precision fixed according to the denominator (=10^p)
local convex hull computation works
don't take into account easy cases in test file