Merge pull request #90 from powerist/packet

Create class InceptionPacket to parse DHCP packet
Update arp eval scripts
Merge pull request #91 from changbl/working

Update arp eval scripts
Failover version: normal functionality

Fix bugs introduced over normal operation of controller
Merge pull request #93 from powerist/failover

Failover version: normal functionality
Fix bug of detecting live migration
Merge pull request #94 from powerist/fixmigration

Fix bug of detecting live migration
Add log for handle migration and raise an error if unknown migration
Merge pull request #95 from changbl/working

Add logger info for handle migration and comment out an impossible case
Change how rpc_manager is constructed
Merge pull request #97 from powerist/rpcswitch

Change how rpc_manager is constructed
Fix RPCManager cls method bug
Merge pull request #98 from changbl/working

Fix RPCManager cls method bug
Fix InceptionPacket: Failure when calling dhcp.__len__