Merge pull request #65 from tribal-tec/master

Fix Win32 build
Add basic sync/async command unit test
Merge branch 'master' of https://github.com/Eyescale/Collage
Improve sync/async command unit test
Implement return value test for tests/command
Merge pull request #66 from eile/master

Add basic sync/async command unit test
Fix queue unit test
Merge pull request #67 from eile/master

Fix queue unit test
Use FindPackages-generated defines.h file
Merge remote-tracking branch 'remotes/origin/master' into configure
Merge pull request #68 from eile/master

Use FindPackages-generated defines.h file
Refactor Barrier API for robustness, deprecate old API
Merge branch 'master' of https://github.com/Eyescale/Collage
Merge pull request #69 from eile/master

Refactor Barrier API for robustness, deprecate old API
Print help always