Upgraded vagrant to 1.2.2; fixed a bug that when vagrant ssh-config
prints quoted string for IdentityFile, the quotes are passed into ssh
command, which results in wrong filename.
Merge pull request #14 from racker/dev/songgao

supporting PROXY line; guessing json before processing.
Merge pull request #15 from racker/songgao/upgrade_vagrant

Upgraded vagrant to 1.2.2;
add halt target to bringdown test vm
Merge pull request #16 from racker/fixes/halt_vm

add halt target to bringdown test vm
using virgo submodule in repo to build and test in vm so that modifications in host machine show up in vm
added some vagrant related files into .gitignore
Merge pull request #17 from racker/songgao/using_virgo_submodule_in_vm

using virgo submodule in vm
using go-proxy-protocol to consume proxy line
added upgrading handler
added more debuging output