Added method to load kytos.json
Added method to load kytos.json

Each NApp loaded will read your own kytos.json and update the object attributes.
Fix #236

renanrodrigo/kytos,erickvermot/kytos,diraol/kytos,cemsbr/kytos,erickvermot/kytos,macartur/kytos,diraol/kytos,cemsbr/kytos,cemsbr/kytos,kytos/kytos,diraol/kytos,kytos/kyco,erickvermot/kytos