major folder reorganisation, R pkg is now epclust/ at first level. Experimental usage...
-rw-r--r-- 33 .gitignore
-rw-r--r-- 675 README.md
-rw-r--r-- 687 TODO
drwxr-xr-x - biblio
drwxr-xr-x - contrat
drwxr-xr-x - data
drwxr-xr-x - epclust
drwxr-xr-x - old_C_code
drwxr-xr-x - slides