Merge pull request #11 from dbeck/master

use gtest as a submodule from virtdb-gtest
Build and send query object to Data Service and receive response data.
Merge pull request #12 from szilardhuber/master

Build and send query object to Data Service and receive response data.
Fixed submodule URL to HTTP.
Merge pull request #13 from szilardhuber/master

Fixed submodule URL to HTTP.
picking up changes from upstream