Changes in the documentation of GraphicalModels.m2. Test for globalMarkov also changed
several changes to GraphicalModels.m2 to remove the bug found in the Berkeley 2014 workshop. This bug created an error when a gaussianRing was declared inside a procedure
Merge branch 'master' of https://github.com/luisgarciapuente/M2

Conflicts:
	M2/Macaulay2/packages/GraphicalModels.m2