Merge pull request #20 from eile/master

Revert to lunchbox::sleep since boost::thread is broken in 1.56
Update after DASH change
Merge pull request #21 from tribal-tec/master

Update after DASH change
Fix build after Pression refactoring
Merge pull request #22 from tribal-tec/master

Fix build after Pression refactoring
Merge branch 'master' of https://github.com/BlueBrain/codash

Conflicts:
	.gitexternals
	.travis.yml