FairRoot release March 2015

Release information:

Solve problem with crashes of FairRoot when running Geant3 simulations on 32bit machines.
The database interface FairDb is not build by default. One has to switch on the option -DWITH_DB=TRUE.
Add script fairroot-config which return information about the used Compilers, SIMPATH and FairRoot version.
Some bug fixes in config.sh and config.csh scripts.
Several fixes in the build system.
Remove dynamic casts at several places where they are not needed to improve performance.
Re-organize base/MQ directory, change library name FairMQSampler to BaseMQ, and link tutorial 3,6,7 accordingly.
Implemented optional modular build.
Add generic MQ-devices (Sampler, Processor, and FileSink) in fairmq.
Remove warnings.
Reorganization of IO classes to make use of the new FairSource class.
Start porting classes to use multi-threading in Geant4.