remove submatrixByDegrees from the package CompleteIntersectionResolutions

because an improved version has been placed in the Core by Mike
remove some unused initialization steps in Makefile
modify the method for "expression" of a monoid element

so a monomial consisting of a single variable is not
a product (of length 1)
Merge branch 'master' of github.com:Macaulay2/M2
Merge branch 'master' of github.com:DanGrayson/M2