Merge pull request #90 from reetuparna/26

Fixes #26

Author: thoas

README.rst

@@ -630,6 +630,17 @@ Generates a sharded string with a fixed length and depth.
 
     funk.Shard("e89d66bdfdd4dd26b682cc77e23a86eb", 2, 2, true) // []string{"e8", "9d", "66", "bdfdd4dd26b682cc77e23a86eb"}
 
+funk.Subset
+.............
+
+Returns true if a collection is a subset of another 
+
+.. code-block:: go
+
+    funk.Subset([]int{1, 2, 4}, []int{1, 2, 3, 4, 5}) // true
+    funk.Subset([]string{"foo", "bar"},[]string{"foo", "bar", "hello", "bar", "hi"}) //true
+   
+    
 Performance
 -----------