Merged requested to merge github/fork/sbernard31/sierra_adopter into master
Created by: sbernard31
Adopters are organizations that voluntarily show their support for the Eclipse IoT projects they have adopted
I'm sure not what is expected as "organizations", so I also added an entry for Leshan(iot.project) as adopter for Californium (another iot.project), but I'm not sure if this is appropriate.
Do not hesitate to only keep the first commit.