The latter doesn't render as code in HTML output.

Regex used in Rubymine to locate the latter form:

    (\+)(:*\w+:(?::|\w)+)(\+)

Use lazy load hooks to set parameter wrapping configuration. This means that it doesn't force Action Controller / Active Record to load, but it doesn't fail if they have already loaded. Thanks @josevalim for the hint.

Don't refer to ActionController::Base in the wrap_parameters initializer - use config object instead. Cuts about 15% off the load time. (#734)

renamed the wrap_parameters :only and :except options to :include and :exclude to make it consistent with controller filters

Normally the table for abstract class won't be existed, so we should not trying to call `#column_names` on it.

Get around weird missing constant error caused by AS instead of simply raising NameError, closes #477.

This will allow us to do a rootless JSON/XML request to server.