Merge pull request #4 from szilardhuber/master

Quick add of the WIP draft of data.proto.
proto files are moving to virtdb-proto project
Merge remote-tracking branch 'upstream/master'
using proto files from virtdb-proto submodule
fix gyp: protoc to generate the output files to the right location
Merge pull request #5 from dbeck/master

aligning gyp and sources with the new virtdb-proto repository