Refactoring, again.

Separate Generator and Processors. Place clear for upcoming changes about pages
only websites powered by pelican !

pelican/contents.py

@@ -40,3 +40,13 @@ class Article(Page):
 
 class Quote(Page):
     base_properties = ('author', 'date')
+
+
+def is_valid_content(content, f):
+    try:
+        content.check_properties()
+        return True
+    except NameError as e:
+        print u" [info] Skipping %s: impossible to find informations about '%s'" % (f, e)
+        return False
+