Deleted transpose function in utils.R since the C function is absent from utils.c. Deleted it as well from internal.Rd
Deleted utils.c and moved function triangulate to triangulate.c
Renamed C function triangulate into c_triangulate and updated triangulate.R
Added new file init.c to declare C and Fortran functions as recommanded by outputs of tools::package_native_routine_registration_skeleton(".")
Updated NAMESPACE "useDynLib(ads, .registration=TRUE)" as recommanded for R >= 3.4
Updated MD5