Update and rename adapter to adapter.md

Author: tashemi

Diff for: chapters/design_patterns/adapter renamed to chapters/design_patterns/adapter.md

@@ -20,8 +20,8 @@ To understand the problem completely best example would be an socket from our us
 This is exactly right situation to use adapter. 
 
 ## Solution
-
-#grid component
+{% highlight coffeescript %}
+# a fragment of 3-rd party grid component
 class AwesomeGrid
 	constructor: (@datasource)->
 		@sort_order = 'ASC' 
@@ -52,6 +52,8 @@ agrid = new AwesomeGrid ['a','b','c','d','e','f']
 agrid.setCustomSorter new RandomSorterAdapter(new RandomSorter)
 agrid.sort() # sort data with custom sorter through adapter
 
+{% endhighlight %}
+
 ## Discussion
 
 Adapter is usefull when you have to organize an interaction between two objects with different interfaces. It can happen when you use 3-rd party libraries  or you work with legacy code.