merging downstream changes
wiring refernce services
first working 'endpoint_client' helper, yet to be integrated in apps
fixed endpoint publisher
major simplification because of new support classes in proto/connector
major simplifications in sample apps because of the additional support classes in virtdb-proto
discovery went to proto/connector/ip_discovery classes
simplifying sample apps, thanks to new virtdb-proto helpers
removing proto project; will be replaced by common
adding common project instead of common
checking/fixing gyp build on MAC
Merge remote-tracking branch 'upstream/master'
Merge pull request #36 from dbeck/master

simplifying sample services with the help of the virtdb-common library