README.md in hash-utils-0.2.0 vs README.md in hash-utils-0.3.0

@@ -10,10 +10,11 @@
 * `#map_pairs!`
 * `#map_keys` – works as [Array#map][5], but for *keys only*,
 * `#map_keys!`
 * `#keys_to_sym` – converts all keys to [Symbols][6],
 * `#keys_to_sym!`
+* …
 
 All methods with `!` emulates work *in place*, but in fact they 
 replace old hash with new one. An example of use: 
 
     foo = {"a" => 1, "b" => 2}
@@ -23,41 +24,65 @@
     #   {:a => 1, :b => 2}
     
 This is the same as `#keys_to_sym!` for example. And also introduces
 some methods known from Python to both [Array][1] and [Hash][2] class:
 
-* `some?` –  returns `true` if *some* element follows condition in block,
+* `some?` – returns `true` if *some* element follows condition in block,
 * `some_pairs?`
-* `all?` –  returns `true` if *all* element follows condition in block,
+* `all?` – returns `true` if *all* element follows condition in block,
 * `all_pairs?`
 
 For example:
 
     foo = [:alfa, :beta, 5, :gama]
-    foo.some? { |i| i.kind_of? Integer }    # returns true
+    foo.some? { |i| i.kind_of? Numeric }    # returns true
     foo.all? { |i| i.kind_of? Symbol }      # returns false
+    
+And finally introduces one method to [Numeric][7], [Symbol][6] and 
+[String][8]:
 
+* `in?` – returns `true` if value is in some Object which support 
+`include?` method
+
+For example:
+    
+    foo = [1, 2, 3, 5, 8]
+    5.in? foo       # returns true
+    5.in? 3..6      # returns true
+    
+As you can see, it's syntactic sugar, of sure, but useful in some cases.
+Except these, it adds many other useful metods. See documentation.
+
+### Modularization
+
+If you don't want to include whole library, you can include extensions 
+to appropriate type only by including the:
+
+    require "hash-utils/<lowercase-data-type-name>"
+
 Contributing
 ------------
 
 1. Fork it.
 2. Create a branch (`git checkout -b 20101220-my-change`).
 3. Commit your changes (`git commit -am "Added something"`).
 4. Push to the branch (`git push origin 20101220-my-change`).
-5. Create an [Issue][7] with a link to your branch.
+5. Create an [Issue][9] with a link to your branch.
 6. Enjoy a refreshing Diet Coke and wait.
 
 
 Copyright
 ---------
 
-Copyright &copy; 2011 [Martin Kozák][8]. See `LICENSE.txt` for
+Copyright &copy; 2011 [Martin Kozák][10]. See `LICENSE.txt` for
 further details.
 
 [1]: http://www.ruby-doc.org/core/classes/Array.html
 [2]: http://www.ruby-doc.org/core/classes/Hash.html
 [3]: http://www.ruby-doc.org/core/classes/Array.html#M000278
 [4]: http://www.ruby-doc.org/core/classes/Array.html#M000279
 [5]: http://www.ruby-doc.org/core/classes/Array.html#M000249
 [6]: http://www.ruby-doc.org/core/classes/Symbol.html
-[7]: http://github.com/martinkozak/hash-utils/issues
-[8]: http://www.martinkozak.net/
+[7]: http://www.ruby-doc.org/core/classes/Numeric.html
+[8]: http://www.ruby-doc.org/core/classes/String.html
+[9]: http://github.com/martinkozak/hash-utils/issues
+[10]: http://www.martinkozak.net/