test against rails 4.0.0
:rubygems is a deprecated source
add Util.rails3?
Model.scoped is deprecated for Model.all in Rails 4
force nokogiri < 1.6 (1.6 requires ruby 1.9.2)
activemodel should be a dev dependency
Appraisable updates:

* always build rails-4 from gem
* build rails-edge from git
* updated gemfiles
make rails 4 required build, edge failable
Model.all spec changes for Rails 4

In Rails 3 Model.all returns an Array. In Rails 4 it returns an association proxy. Most of these changes are so that Rails 3 tests get an Array, and Rails 4 get a thing that quacks like an association proxy.
Pass block through MockScope#each and #map
fixup travis.yml
include not supported as parameter to where for rails 4
update to rspec-rails 2.12 for and_call_original support
Model.all with parameters is deprecated
Merge pull request #946 from justinfrench/rails4

Fix deprecations and compatibility issues in Rails 4.