Fortran: remove unused variables

Fixed a potential bug with the latest versions of the "geometry" package when calling Delaunay triangulation: removing duplicates

last changes for the release v1.4

- remove unnecessary LazyData keyword in DESCRIPTION

remove old-style format for persons in the CITATION file

Merge pull request #5 from fzao/fast_pareto

perf: keep only the fortran version of pareto(), dominate() and dominated()

perf: translation of three functions (dominate, pareto and dominated) into fortran

passing extra argumments to the user's function

test for NA values

clean code

indent fix

MPI vignette done

Example of a multi-fronts optimization

some linter compliances