update due to replace raw hit container type from std::map to std::vector, and minor bug corrected for the simple clustering algorithm
update destructor and Clear() function
getting number of time bins used in current event by StIstCollection::getNumTimeBins() function
getting number of time bins used in current event by StIstCollection::getNumTimeBins() function
updating mDefaultTimeBin initial value to 2
add setDefaultTimeBin() while filling raw hits information