Support touch events on the speed slider
Let the environment respond to touch events
Add touch support to the carry tool
Fix bug dropping agent on invalid locations
Display uncaught exceptions in a dialog
Throw exception on unfound properties

Backtracking on my earlier change
Hold root size constant in sunlight models
Specify AddOrganismButton images explicitly, instead of using the species image definitions
Show money count on water field
Mutation can be turned on/off for each Trait
Fix close button on models with the Info Tool
Track whether an agent was bred or not

Also, fix the money counter on the water field model.
Fix event handling on slider so it doesn't interfere
Fix typo
Fix CustomEvent polyfill to correctly use 'detail'
Tweak index UI to lay out links better
Allow changing the season lengths on the fly
Notify listeners when the season changes
Fix bug when seasons are enabled, but no winterImgSprite has been defined
Fix barrier location