libopenflow: Minor improvements
libopenflow: Minor improvements

A lot of this is formatting, but this also adds a couple useful
properties and fixes (I think) the packet_in length calculation.

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