[TACHYON-127] Deploy Tachyon Cluster through Vagrant 

What's working?
We can start a Tachyon cluster on VirtualBox and AWS using HDFS 2.4.1 and glusterfs as under filesystem.

What next?
- more under filesystem (ceph, hadoop 1.0.4)
- more providers: Docker, OpenStack.

@haoyuan 
after instances are up, the network is like this
![ec2-up](https://cloud.githubusercontent.com/assets/7062400/4796536/f4740ec8-5e03-11e4-9f5f-3d406d2bf2ee.png)