Use dup to preserve previous behavior

Fix misspelling of 'lambda'. Closes #987

Updated the ActiveResource changelog

Attributes with :string type should not be given the type passed in model. Closes #1058.

Attributes with :string type should not be given the type passed in model serialization options. Closes #1058

on.upcase!

improvements on PostgreSQL schema queries

Update Rack::Mount to 0.8.1

Fix railties warnings

this fixes: "warning: ambiguous first argument; put parentheses or even spaces"
because: you need this to tell the parser that you're not calling :/ method (division)
details (Japanese!): http://blade.nagaokaut.ac.jp/cgi-bin/vframe.rb/ruby/ruby-dev/42445?42370-43277

to make sure we're not calling the :* operator

fixes: "warning: instance variable @inside_template not initialized"

ActiveResource json updates

change `for ... in` in the generator templates to Enumerator#each

Add some missing requires for AS core_ext/numeric/time. Closes #1038

Fixing typo in test for turn gem

I believe this is more modern way

pg_namespace has not been used since this commit 29b0707f

add test case for turn gem for testunit.

Putting back mysql2 and sqlite3 in database.yml docs. In case people use