+ Master server create_index()
 - remove unimported configure
 * Rollback Makefile.am
 + Added IndexNamespaceInterface
 + Added PartitionManagerInterface
 + Added MockIndexNamespace and MockPartitionManager
 * Use MockIndexNamespace and MockPartitionManager to run MasterControllerTest
 * Fixed the initialize order of MasterController's fields
 + Added comments for PartitionManagerInterface
 * Fixed indent
Merge branch 'master' into master_server_create_index
 * Fixed a typo
Merge pull request #23 from vsfs/master_server_create_index

Added MasterController::create_index