Support setting barriers on the fly
Plant variation with mountains interactive

[#65230960]
Remove agents immediately when changing mountain sizes
Make sure to clean up carried agents in the carry layer after they're dropped

[#70893106]
Use objects in predator/prey/hiding place arrays so we can associate traits with species
Fix bug with properties in basic animals/plants

We need to clone default properties so that each individual organism has
its own set.
Fix assigning random sex to basic animals

Coffescript doesn't understand ternary notation
Fix dialog wording

[#65230960]
Varied rabbits species

[#65231088]
Changing environments model

[#65231088]
Add the dam model to the index
Add chart variation of the mountains model

[#71027336]
randomLocationWithin helper
Reverse dam model

[#65231322]
Support remove buttons associated with an add organism button

[#65231480]
Open model for changing environments

With grass, rabbits, hawks and foxes
[#65231480]
Notify when a remove organisms button is clicked
Better key layout
Only chart the number of flowers for the chart version of the mountains model
Add graph toggle to main mountain model

[#71027336]