* master: (30 commits)
Bump tzinfo. 0.3.31 was released on November 6, 2011.
Fix GH #4909. Dependency on TZInfo move from AR to AS.
moving ordered hash to normal hash because ruby 1.9.3 hash defaultly ordered one
Refactored the OrderedHash related stuff
Replaced OrderedHash usage with Ruby 1.9 Hash
Replaced OrderedHash with Hash for ruby 1.9 series
removed unnecessary code
replacing the orderhash with hash for ruby-1.9
Clean up some wording.
test title changed corresponding to the test
replaced active support ordered hash to ruby hash on active resource
PostgreSQL does not work in the same way of the other adapters
AR::Relation#pluck: improve to work with joins
Fix match docs
Fix attribute_before_type_cast for serialized attributes. Fixes #4837.
Fix failing request test
Fixes in AMo README
Update README to mention lint.
Trim down Active Model API by removing valid? and errors.full_messages