Removed ugly loading of string codecs

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%40357

scrapy/trunk/scrapy/contrib/codecs/__init__.py

@@ -1 +1 @@
-from scrapy.contrib.codecs import x_mac_roman
+from scrapy.contrib.codecs.x_mac_roman import XMacRomanCodec

scrapy/trunk/scrapy/contrib/codecs/x_mac_roman.py

@@ -311,4 +311,6 @@ def x_mac_roman_search_function(name):
     if name == 'x-mac-roman':
        return getregentry()
 
-codecs.register(x_mac_roman_search_function)
+class XMacRomanCodec(object):
+    def __init__(self):
+        codecs.register(x_mac_roman_search_function)

scrapy/trunk/scrapy/core/engine.py

@@ -20,7 +20,6 @@ from scrapy.item.pipeline import ItemPipeline
 from scrapy.spider import spiders
 from scrapy.spider.middleware import SpiderMiddlewareManager
 from scrapy.utils.defer import chain_deferred, defer_succeed, mustbe_deferred, deferred_degenerate
-from scrapy.contrib import codecs
 
 class ExecutionEngine(object):
     """