fixed the uuid count for the latest version of couchdb

also avoided CONSTANTS warnings, cleaned up the attachment specs, added missing fixtures

lib/couchrest/core/server.rb

@@ -79,7 +79,7 @@ module CouchRest
     def next_uuid(count = @uuid_batch_count)
       @uuids ||= []
       if @uuids.empty?
-        @uuids = CouchRest.post("#{@uri}/_uuids?count=#{count}")["uuids"]
+        @uuids = CouchRest.get("#{@uri}/_uuids?count=#{count}")["uuids"]
       end
       @uuids.pop
     end

lib/couchrest/mixins/callbacks.rb

@@ -325,7 +325,7 @@ module CouchRest
     end
         
     module ClassMethods
-      CHAINS = {:before => :before, :around => :before, :after => :after}
+      CHAINS = {:before => :before, :around => :before, :after => :after} unless self.const_defined?("CHAINS")
       
       # Make the _run_save_callbacks method. The generated method takes
       # a block that it'll yield to. It'll call the before and around filters

lib/couchrest/mixins/extended_attachments.rb

@@ -14,7 +14,7 @@ module CouchRest
 
       # reads the data from an attachment
       def read_attachment(attachment_name)
-        Base64.decode64(database.fetch_attachment(self.id, attachment_name))
+        Base64.decode64(database.fetch_attachment(self, attachment_name))
       end
 
       # modifies a file attachment on the current doc

lib/couchrest/more/extended_document.rb

@@ -1,4 +1,5 @@
 begin
+  # still required for Time parsing and pluralization in the validation
   require 'extlib'
 rescue 
   puts "CouchRest::ExtendedDocument still requires extlib (not for much longer). This is left out of the gemspec on purpose."