Merge remote branch 'tapajos/master'

Conflicts:
	README.md
	lib/couchrest/mixins/properties.rb
	spec/couchrest/core/database_spec.rb
	spec/couchrest/more/extended_doc_spec.rb

lib/couchrest/more/extended_document.rb

@@ -245,6 +245,7 @@ module CouchRest
     # if the document is not saved properly.
     def save!
       raise "#{self.inspect} failed to save" unless self.save
+      true
     end
 
     # Deletes the document from the database. Runs the :destroy callbacks.