make SDN GRE work with XCP 1.6
fix white-space
add two tables for gre controller
re-factor gre controller prototype
re-factor gre controller

Signed-off-by: tuna <ng.tuna@gmail.com>
tuna
tuna add port forwarding support
add kvm support & LB service
tuna
fix rebase master
fix UI
move cloudstack_pluginlib
remove unused table: ovs_nic_map
refactor ovsProvider to new resource
fix staticNat after rebase
remove unused code
post-rebasing