Slight documentation changes

README.md

@@ -2,15 +2,22 @@ Package bitset implements bitsets.
 
 It provides methods for making a BitSet of an arbitrary
 upper limit, setting and testing bit locations, and clearing
-bit locations as well as the entire set.
+bit locations as well as the entire set, counting the number
+of bits.
+
+It also supports set intersection, union, difference and 
+symmetric difference, cloning, equality testing, and subsetting.
 
 Example use:
-
-    b := bitset.New(64000)
-    b.SetBit(1000)
-    if b.Bit(1000) {
-        b.ClearBit(1000)
-    }
+
+        import "bitset"
+        b := bitset.New(64000)
+        b.SetBit(1000)
+        b.SetBit(999)
+        if b.Bit(1000) {
+        	b.ClearBit(1000)
+        }
+        b.Clear()
 
 Discussion at: [golang-nuts Google Group](https://groups.google.com/d/topic/golang-nuts/7n1VkRTlBf4/discussion)
 

bitset.go

@@ -7,10 +7,15 @@
 
 	It provides methods for making a BitSet of an arbitrary
 	upper limit, setting and testing bit locations, and clearing
-	bit locations as well as the entire set.
+	bit locations as well as the entire set, counting the number
+	of bits.
+	
+	It also supports set intersection, union, difference and 
+	symmetric difference, cloning, equality testing, and subsetting.
 
 	Example use:
-
+    
+	import "bitset"
 	b := bitset.New(64000)
 	b.SetBit(1000)
 	b.SetBit(999)