fix readme

README.rdoc

@@ -67,14 +67,6 @@ changes:
  cache.get('foo', :raw => true).memcache_flags.to_s(2)
  => "1111111100001000"
 
-- +incr+ and +decr+ automatically initialize the value to 0 if the key doesn't
- exist. The +count+ method returns the integer count associated with a given key.
-
- cache.count('hits') # => 0
- cache.incr('hits', 52) # => 52
- cache.decr('hits', 9) # => 43
- cache.count('hits') # => 43
-
 - In addition to +add+, which was already supported, support has been added for +replace+,
  +append+ and +prepend+ from the memcached protocol.
 
@@ -107,7 +99,7 @@ changes:
  => "modified"
 
 - Several additional convenience methods have been added including +get_or_add+,
- +get_or_set+, +update+, +get_some+, +lock+, +unlock+, and +with_lock+.
+ +get_or_set+, +add_or_get+, +update+, +get_some+, +lock+, +unlock+, and +with_lock+.
 
 === Implementation