Ci tests
This merge request includes the first version of the testpackage included within this repository. This is a package that is not built by default and thus induces no overhead in the normal build process, but can be built individually with StatAnalysis as parent project.
The testpackage currently includes a test for ROOT as an example, but ideally each of the included softwares should be tested in this package. The readme and included ROOT test should provide a clear enough example to allow developers of other softwares included in this package to built a similar test for their software.
See the added readme for more info.
Also have a look at the CI output for the "test" stage.
Please do not hesitate to include comments or suggestions for doing things differently.