Implemented optional modular build:
- triggered with FAIRROOT_MODULAR_BUILD option
- does not require the environment variables SIMPATH and FAIRROOTPATH
Migration of MC classes for multi-threading:
- RootManager and Logger not yet ported
Load library explicitely, since the library TutFairDbMQ contain partly the same classes as libFairTestDetector. This results in problems when using rootmap files. The problem has to be correctly fixed in Tutorial6 by renaming the classes.