Signed-off-by: NYehuda Katz <wycats@gmail.com>

Ruby 1.9.2 compat: Use File#expand_path for require path because "." will not be included in LOAD_PATH since Ruby 1.9.2 [#2921 state:resolved]
Signed-off-by: NYehuda Katz <wycats@gmail.com>

  - Define to_model on AR
  - Define to_model on ActiveModel::APICompliant
  - Update test fixtures to be API Compliant
  - Start using to_model in AP

* raise a KeyError exception for missing named interpolation args (like Ruby 1.9 does)
* raise an ArgumentError when mixing named and unnamed placeholders (like Ruby 1.9 does)
* improve docs and comply a bit more w/ Rails names/conventions

[#2870 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

[#765 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Signed-off-by: NCarl Lerche <carllerche@mac.com>

Make it so AR attributes which conflict with object-private methods (e.g. system) don't 'randomly' cause NoMethodErrors

Previously if you called this attribute before others, you'd get exceptions.  But if it was the second-or-subsequent attribute you retrieved you'd get the correct behaviour.
Signed-off-by: NMichael Koziarski <michael@koziarski.com>
[#2808 state:committed]