Bug 1637: Added expression node timers and fixed a few warnings.

.gitattributes

CEP/Calibration/BBSKernel/CMakeLists.txt

CEP/Calibration/BBSKernel/include/BBSKernel/CMakeLists.txt

CEP/Calibration/BBSKernel/include/BBSKernel/Evaluator.h

CEP/Calibration/BBSKernel/include/BBSKernel/Expr/BasicExpr.h

CEP/Calibration/BBSKernel/include/BBSKernel/Expr/Expr.h

...libration/BBSKernel/include/BBSKernel/Expr/ExprAdaptors.h

CEP/Calibration/BBSKernel/include/BBSKernel/Expr/FlagIf.h

...Calibration/BBSKernel/include/BBSKernel/Expr/MergeFlags.h

CEP/Calibration/BBSKernel/include/BBSKernel/Expr/Timer.h

CEP/Calibration/BBSKernel/src/CMakeLists.txt

CEP/Calibration/BBSKernel/src/Evaluator.cc

CEP/Calibration/BBSKernel/src/Expr/ConditionNumber.cc

CEP/Calibration/BBSKernel/src/Expr/EquatorialCentroid.cc

CEP/Calibration/BBSKernel/src/Expr/ExprAdaptors.cc

CEP/Calibration/BBSKernel/src/Expr/ExprParm.cc

CEP/Calibration/BBSKernel/src/Expr/ExprVisData.cc

CEP/Calibration/BBSKernel/src/Expr/IonPhaseShift.cc

CEP/Calibration/BBSKernel/src/Expr/LMN.cc

CEP/Calibration/BBSKernel/src/Expr/Literal.cc