New FairRoot patch releases

Meanwhile there have been 3 new patch releases for FairRoot.

The first two v-15.11b and v-15.11c have been released to solve some problems with the reading of real data using FairRunOnline and FairUnpack. The third one v-15.11d solves some problem with setting the correct environment when running tests with ROOT6. More details about the patches are on the github release page at