[PATCH 3/4] layouts: allow config of high numbers of entities in few conf lines

Previous conf expansion was limited to "n-to-1" or "n-to-n" matching like :

Entity=node[1-10] key=value
Entity=node[1-10] key=value[1-10]

Now it is possible to have cycled or splitted "n-to-m" matching having
m<n or m>n (with m mod(n) being zero) like :

Entity=node[1-10] Enclosed=node[1-10]_core[0-31]
Entity=node[1-10]_core[0-31] core_id=[0-31] ...

Where :
	- node1 will enclose node1_core[0-31]
	- node2 will enclose node2_core[0-31]
	- ...

	- node1_core0 will have a core_id of 0
	- node1_core1 will have	a core_id of 1
	- ...
	- node2_core0 will have	a core_id of 0
	- ...