Update for US format. Updated Readme. Hungary number bug fix

Readme.rdoc

@@ -70,11 +70,12 @@ When given a string, it interpolates the string with the following fields:
     pn.format("+ %c (%a) %n") # => "+ 385 (91) 5125486"
 
 When given a symbol it is used as a lookup for the format in the <tt>Phone.named_formats</tt> hash.
-    pn.format(:europe)
+    pn.format(:europe) # => "+385 (0) 91 512 5486"
+    pn.format(:us) # => "(234) 123 4567"    
 
 You can add your own custom named formats like so:
     Phone.named_formats[:short] = '%A/%n1-%n2'    
-    pn.format(:short)
+    pn.format(:short) # => 091/512-5486
 
 = TODO
 Parse testing for different countries. Currently tested on: US, Croatia, Slovenia, Hungary, Serbia, Bosnia and Herzegovina, 

data/countries.yml

@@ -741,6 +741,7 @@
   :char_3_code: HU
   :name: Hungary
   :international_dialing_prefix: "0"
+  :area_code: "1|[2-9][0-9]"
 "263": 
   :country_code: "263"
   :national_dialing_prefix: "0"

lib/phone.rb

@@ -27,7 +27,9 @@ class Phone
   @@n1_length = 3
 
   @@named_formats = {
-    :europe => '+%c (0) %a %f %l'
+    :default => "+%c%a%n",
+    :europe => '+%c (0) %a %f %l',
+    :us => "(%a) %f-%l"
   }
 
   def initialize(*hash_or_args)    
@@ -161,18 +163,19 @@ def number2
     number[-n2_length, n2_length]
   end
 
-  # formats phone number.
+  # Formats the phone number.
   # 
-  # if the method argument is a Symbol, it is used as a lookup key in Phone.named_formats
-  #   pn.format(:europe)
+  # if the method argument is a String, it is used as a format string, with the following fields being interpolated:  
+  #
+  # * %c - country_code (385)
+  # * %a - area_code (91)
+  # * %A - area_code with leading zero (091)
+  # * %n - number (5125486)
+  # * %n1 - first @@n1_length characters of number (configured through Phone.n1_length), default is 3 (512)
+  # * %n2 - last characters of number (5486)
   #
-  # if the method argument is a String, it is used as a format string, with the following fields being interpolated:
-  # %c - country_code (385)
-  # %a - area_code (91)
-  # %A - area_code with leading zero (091)
-  # %n - number (5125486)
-  # %n1 - first @@n1_length characters of number (configured through Phone.n1_length), default is 3 (512)
-  # %n2 - last characters of number (5486)
+  # if the method argument is a Symbol, it is used as a lookup key for a format String in Phone.named_formats
+  #   pn.format(:europe)
   def format(fmt)    
     if fmt.is_a?(Symbol)
       raise "The format #{fmt} doesn't exist'" unless named_formats.has_key?(fmt)
@@ -184,7 +187,7 @@ def format(fmt)
 
   # the default format is "+%c%a%n"
   def to_s
-    format("+%c%a%n")
+    format(:default)
   end
 
   # does this number belong to the default country code?