Merge pull request #21 from dbeck/master

revamped submodules and integrated virtdb-common project
Update README.md
Getting CXX command from environment instead of hardcoded value.
Updated proto.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Makefile
	src/proto
Updated proto
Tried to add logging to diag service.
Merge pull request #23 from szilardhuber/master

Tried to add logging to diag service.