add virtdb-common as a submodule
Merge remote-tracking branch 'upstream/master'
updateing gtest and proto libs
restructuring submodules
common lib goes to the root
renovating Makefile infrastructure; aligning with common and proto projects
make infrastructure is now using common submodules
fixing and integrating build system w/ common
Merge pull request #21 from dbeck/master

revamped submodules and integrated virtdb-common project