outsourced several tool operations to create random matrices

to MatricesForHomalg v2013.07.14:

. ListOfDegreesOfMultiGradedRing
. MonomialMatrixWeighted
. RandomMatrixBetweenGradedFreeLeftModulesWeighted
. RandomMatrixBetweenGradedFreeRightModulesWeighted

+ outsourced the pictogram MonomialMatrix to HomalgToCAS v2013.07.14
+ outsourced the ring table entries MonomialMatrix to RingsForHomalg v2013.07.14