Log Message:
Update mathomatic to 11.4.

Changes:
Changed sum and product commands to not create another equation if the
result is a constant.  If the result is a constant, it is just displayed.

Mathomatic now approximates -1^(2^.5) and the like.

Added modulus (%) operator.

Added simplification of univariate modulus expressions.

Changed univariate modulus simplification to multivariate, integer only
simplification.