(I forgot to change it everywhere)

Merge branch 'master' of https://gricad-gitlab.univ-grenoble-alpes.fr/verimag/synchrone/sasa into 11-add-lustre-oracles-to-all-examples-of-the-test-directory

merge origin/3-compute-the-graph-degree-diameter-etc

nb: this demon is not fair: it is biased by the degree of nodes.

the doc generation should not be run on a docker that does not have emacs

Add the doc generation in the test to avoid such CI failueres in the future

Add use it to add an oracle to the BFS

Took into account Erwan's comments and changed Register module such that the properties are computed on first call (except height that is computed on each call because it depends on the chosen tree's root)

Add use it to add an oracle to the BFS

Fix: take into account in dot.ml the change in Topology done in #e76aa9be

where a weigth label has been added

Basically, the idea is to parse the result of the registred ('s ->
string) function.

For instance if  the user define 'v and 'v printer as follows:

 type state = { a : int ; b : float }
 let state_to_string s = Printf.sprintf "x=%d y=%f" s.v1 s.v2

pid_x and pid_y will be used as output var names in the RIF outputs.

If the user provide no name:
 let state_to_string s = Printf.sprintf "%d %f" s.v1 s.v2

some names will be invented (pid_v0 and pid_v1)

All the get_* functions (that are of no interest for users) are now in
the Register module.

Things that are currently broken:
- the ability to init vars in the dot
- controling the name of local vars in the rif output

The idea is to use the Obj module (arg !!!), which is safe thanks to
the fact that there is now only one register function, which forces all the
'v to be bound to the same type.