* Fxing issue with Example1

        - The reaction occur uniformly in the target
        - reaction conditions a recorded in a specific class
        - still the Example1 give a wrong Ex... to be fixed

        - The active flag was reset to 0 preventing reaction from
          occuring

        - The event rate display was wrong on Linux system when using MT
        - Event rate is now correct
        - Improved Thread Scheduling for slightly faster analysis
        - add Option to switch off MT at compilation
        - Improve CATS performance dramatically (3 time faster)
        - remove a few using namespace std laying around

        - Readin file without RunToTreat file
* Suppress using namespace std from Core header

        - Number of DE produce by ionisation is now fixed per mm
        - YIELD no longer used
        - DE track carry weight of the DE
        - DE scorer read out hte weight
        - Amplification also use weight and fixed amount of generated
          electron
This should insure smoother performance with regards to different setup

thetaX's sign is converted to -thetaX because MDMTrace's input angle is the angle seen from beam downstream to upstream.'

Put back to the original Configuration reading setup. I was just confused with the original setup, but now makes sense.

Resolving merge conflict after commit: changing energy thresholds units in TTiaraBarrelPhysics.cxx from MeV to keV.

Changed energy threshold units from MeV to keV, and the addition of 1) relevant channels in the 'InitializeStandardParameters()' function, 2) tokens used in config file in 'ReadAnalysisConfig()' function, and 3) checks that a hit chennel is a valid channel in the PreTreat.