Check to see what kind of Fraction to create in Linear Programming problem -- MathObjects or regular Fraction

    This fixes a regression reported for the old style linear programming problems written at ASU. A decision needs
    to be made as to whether to continue to support old style Fractions in this file.
    By adding a few commands to the MthObjects Fractions we could have it imitate the behavior of the old style fraction.
    This might be a better permanent fix.
Merge pull request #124 from mgage/release/2.9_linprog_fix

Fix regression affecting Linear Programming problems from ASU

Works for me!