Initiating state

Hello !

Here is a PR implementing the initiating state. 

When you think we can merge this into the `devel` branch I will start to clean up my `ll_central_role` branch which will be quite a lot of work :) 

BTW the connection state (central role) is now working with multiple connections support (tried only 2 at the moment but I am going to make tests with 10 this week) !