Updated files...see notes------------------------------------------->Added RANGE, RANGE-ALL, RANGE-START, RANGE-END, RANGE-EMPTY(Expanded EMPTY function so it would call RANGE-EMPTY), RANGE-SIZE(Expanded SIZE function so it would call RANGE-SIZE), MAGNITUDE, CALC-COVAR-MATRIX, MAHALANOBIS, MAT-RANGE(Expanded MAT function so it would call MAT-RANGE). Added Examples and Documentation for all of the aforementioned functions. Added RANGE type and GC functions for RANGE.  Fixed some typos and fixed GC issues and errors in some examples.