Comment 2 for bug 459714

Created two simple data generators:
 - examples/randoms/randtree which can create a simple unidirectional tree structure (like a menu tree)
 - examples/randoms/randsocial can create a social network with friends/weight and fans
both can be specific at arbitrary size, with variable # of friends and fans, and random weight within a range.
This should enable more stringent testing of some aspects.