Add Blueprints section to the "How to Contribute" guide (#1137)
Add Blueprints section to the "How to Contribute" guide (#1137)

Add a new Blueprints section on the development guide, and some
update some contact links.

Co-authored-by: Humberto Diógenes <501403909cc9f280d7b309f538ccef48929a3684@gmail.com>
Co-authored-by: Gleyberson Andrade <ddd2090641008f07464b1cbcf70c456601c343e6@gmail.com>
kytos/kytos,kytos/kyco