Update to netlogo snapshot for variable watching stuff
Add test that checks to make weighted distances update
Upgrade to netlogo snapshot that allows watchers to delete themselves
Add weighted benchmarks
Add caching for weighted networks via Jung

Not a final solution: doesn't returns randomized paths
Implement caching dijkstra's for weighted networks
Squashed commits:
[5dc7950] wip make distance and path primitives use caching code
[aefc871] wip Get dijkstra's somewhat working
[98831f4] wip Moving caching stuff over to support weighted networks
[0de1c04] wip preliminary dijkstra's implementation
Relocate weighted primitives accordingly

They should no longer be in the jung package
Merge pull request #113 from NetLogo/102-weighted-graph-speed-regression

Add caching to weighted networks