Work on #213

- properly categorize all patterns
- remove pattern list from readme
- minor fixes to readme
- removed "introduction" because its not a pattern and an error i
committed some time ago

multiton/index.md

@@ -3,8 +3,8 @@ layout: pattern
 title: Multiton
 folder: multiton
 permalink: /patterns/multiton/
-categories: creational
-tags: pattern_tag
+categories: Creational
+tags: Java
 ---
 
 **Intent:** Ensure a class only has limited number of instances, and provide a