software switch and friends: refactored handler structure
software switch and friends: refactored handler structure

now OFConnection invokes a single callback function
  on_message_received(connection, message)
when an OpenFlow message has been received and decoded. The
multiplexing to different handlers for different types hapens
in the switch.

VamsikrishnaNallabothu/pox,kulawczukmarcin/mypox,andiwundsam/_of_normalize,diogommartins/pox,noxrepo/pox,andiwundsam/_of_normalize,pthien92/sdn,jacobq/csci5221-viro-project,PrincetonUniversity/pox,jacobq/csci5221-viro-project,adusia/pox,VamsikrishnaNallabothu/pox,adusia/pox,waltznetworks/pox,kulawczukmarcin/mypox,kpengboy/pox-exercise,chenyuntc/pox,xAKLx/pox,kpengboy/pox-exercise,kpengboy/pox-exercise,waltznetworks/pox,PrincetonUniversity/pox,VamsikrishnaNallabothu/pox,xAKLx/pox,kavitshah8/SDNDeveloper,denovogroup/pox,noxrepo/pox,xAKLx/pox,diogommartins/pox,PrincetonUniversity/pox,MurphyMc/pox,carlye566/IoT-POX,carlye566/IoT-POX,chenyuntc/pox,diogommartins/pox,carlye566/IoT-POX,denovogroup/pox,andiwundsam/_of_normalize,kavitshah8/SDNDeveloper,adusia/pox,MurphyMc/pox,noxrepo/pox,diogommartins/pox,waltznetworks/pox,carlye566/IoT-POX,diogommartins/pox,jacobq/csci5221-viro-project,VamsikrishnaNallabothu/pox,VamsikrishnaNallabothu/pox,pthien92/sdn,PrincetonUniversity/pox,pthien92/sdn,chenyuntc/pox,kulawczukmarcin/mypox,jacobq/csci5221-viro-project,xAKLx/pox,jacobq/csci5221-viro-project,noxrepo/pox,denovogroup/pox,adusia/pox,MurphyMc/pox,xAKLx/pox,waltznetworks/pox,MurphyMc/pox,MurphyMc/pox,carlye566/IoT-POX,waltznetworks/pox,kulawczukmarcin/mypox,denovogroup/pox,denovogroup/pox,pthien92/sdn,chenyuntc/pox,andiwundsam/_of_normalize,kavitshah8/SDNDeveloper,adusia/pox,kpengboy/pox-exercise,PrincetonUniversity/pox,kulawczukmarcin/mypox,pthien92/sdn,chenyuntc/pox,kpengboy/pox-exercise,kavitshah8/SDNDeveloper