1.9 -> 1.8 syntax.
Add ruby 2.0 to travis build.
Update compatibility text.
Clarify comment.
Clarify.
Copy.
Entity #== equality compares id or else instance.

Just like ActiveRecord::Base.
Bump version.
Documenting activemodel gotcha.

Found it when I tried the quick test gist.
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Adding our latest app to the "Apps" section.
Merge pull request #5 from barsoom/master

Pull in barsoom changes