Merge branch 'emma'

* emma:
  Add Rails 3 / 2.3 instructions to README.
  Update Gemfile.lock with new PaperTrail version.
  Add note about symbolds in the meta hash.
  Promote patch version to 1.6.5.
  Add Emmanuel to list of contributors.
  Tie PaperTrail to Rails 2.3.
  Silence Rails 3 deprecation warnings.

lib/paper_trail/version.rb

@@ -2,25 +2,22 @@ class Version < ActiveRecord::Base
   belongs_to :item, :polymorphic => true
   validates_presence_of :event
 
-  named_scope :with_item_keys, lambda { |item_type, item_id| {
-    :conditions => { :item_type => item_type, :item_id => item_id }
-  } }
+  scope :with_item_keys, lambda { |item_type, item_id|
+    where(:item_type => item_type, :item_id => item_id)
+  }
 
-  named_scope :subsequent, lambda { |version| {
-    :conditions => ["id > ?", version.is_a?(ActiveRecord::Base) ? version.id : version],
-    :order      => "id ASC",
-  } }
+  scope :subsequent, lambda { |version|
+    where(["id > ?", version.is_a?(Version) ? version.id : version]).order("id ASC")
+  }
 
-  named_scope :preceding, lambda { |version| {
-    :conditions => ["id < ?", version.is_a?(ActiveRecord::Base) ? version.id : version],
-    :order      => "id DESC",
-  } }
+  scope :preceding, lambda { |version|
+    where(["id < ?", version.is_a?(Version) ? version.id : version]).order("id DESC")
+  }
 
-  named_scope :after, lambda { |timestamp| {
-    :conditions => ['created_at > ?', timestamp],
+  scope :after, lambda { |timestamp|
     # TODO: is this :order necessary, considering its presence on the has_many :versions association?
-    :order      => 'created_at ASC, id ASC'
-  } }
+    where(['created_at > ?', timestamp]).order('created_at ASC, id ASC')
+  }
 
   # Restore the item from this version.
   #