Clean up test target naming more:
* Standalone projects use 'tests' from CommonCTest to build before test
* BY used cis (different name...), now uses tests to:
** tests: sum( project-test )
** project-test: depends on project (download..build)
* Reduce #cores on Travis for better readability, since the VMs use 1.5
  cores only
Merge pull request #67 from eile/master

Clean up test target naming