Retire SWIG targeted languages, except those really used by delaunator
if DEBUG => ifdef DEBUG for simply need -DDEBUG in compiler
unused unit tests
Permit to user to choose finder mode at Delaunator instanciation
check done things
Finder modes are now choose at Delaunator object instanciation
Adapting to new finder mode choosing
choose the random mode 'cause its show the use of args (and its funny too)