Process the declaration into a binding if the key is null or if a model exists at the specific key. [#172]
Update the model setters to use @view.models is the @key is null (top-level keypath). [Closes #172]
Build 0.5.4.
Only take models from the parent scope if they are not already defined on the iterated scope (iterating a model on the same key as one in the parent view, for example).
Build 0.5.5.
Add if and unless binders for binding and unbding entire subviews in a template. [Closes #173]
Merge pull request #176 from mikeric/if-unless-binders

Add if and unless binders
Build 0.5.6.
Access binders from the Rivets object instead of assuming the global module's presence.
Build 0.5.7.
Update the introductory text in the README.