PgRouting - Contraction Hierarchies

Hi @cvvergara,

I sent it to you by email.

I have rewritten my PRs in three, according to your recommendations:

Could you have a look at both and tell me if we need to talk in a visio later?

I also have made one more PR where I noted my contribution steps, which could be useful for others I think : Contributing guide by AuBousquet · Pull Request #13 · AuBousquet/pgrouting · GitHub

Could you tell me if you would like to integrate it in the develop branch?

Regards,
Aurélie BOUSQUET