Add mouse tracking
Merge pull request #121 from NetLogo/mouse

Add mouse tracking
Remove links from view when given who = -1. Fixes #112
Merge pull request #122 from NetLogo/112-remove-links

Remove links from view when given who = -1
Initialize local and remote with a blank model instead of climate change. Fixes #95
Merge pull request #123 from NetLogo/95-start-blank

Initialize local and remote with a blank model instead of climate change
Preserve applicable patch data on world resize. Fixes #80

This is particularly to guard against receiving new patch data from a resize-world before receiving the updates to the world object.