Merge pull request #119 from eile/master

Adapt to FlatBuffers changes. .gitexternal is the link to FlatBuffers.
Fix non-system Boost find
Merge pull request #120 from tribal-tec/master

Fix non-system Boost find
Add zmq package name
Merge branch 'master' of https://github.com/Eyescale/Buildyard

Conflicts:
	.gitexternals