+ Added missing thrift_utils.cpp
Merge branch 'master' into master_server
 * Initialize migrating master server's rpc code
 * Added MasterControllerTest
 * Change the namespace of thrift classes from vsfs::rpc to vsfs
 - Remove join_index_server(pos, node_info, &addresses)
Merge branch 'master' into master_server
Merge branch 'master' into master_server
 * Resolve conflicts
 + When an IndexServer joins the ring, MasterServer returns the successors of it
 to act as replica servers.
 + Added test case for GetReplicaServers
Merge branch 'master' into master_server
 * Added rules to ignore Thrift generated files
Merge pull request #15 from vsfs/master_server

A basic compile able master controller.