Changes in version 1.2                         

    o   Added the aggregateAcrossGenes() function, to compute an
	aggregate expression value for gene sets.

    o   Added compute.cohens.d=, compute.delta.mean= and
	compute.delta.detected= options to scoreMarkers().

    o   Support top=Inf in chooseHighlyVariableGenes(). Also added the
	bound= argument to set a hard upper/lower bound.

    o   Bugfix for correct filtering with block= in the various
	filter*QcMetrics() functions when not all blocking levels are
	present.

    o   Bugfix to clusterKmeans() to respect the user-supplied seed= in
	relevant initialization methods.