Merge pull request #13 from wagh/devel

Coding Style
removed commented declaration
hosted several tool operations to create random matrices

. ListOfDegreesOfMultiGradedRing
. MonomialMatrixWeighted
. RandomMatrixBetweenGradedFreeLeftModulesWeighted
. RandomMatrixBetweenGradedFreeRightModulesWeighted
(outsourced from GradedRingForHomalg v2013.07.14)
declared and installed two methods for RandomMatrix

using RandomMatrixBetweenGradedFreeLeftModulesWeighted