README.md in hash_dot-2.1.0 vs README.md in hash_dot-2.2.0

@@ -1,5 +1,7 @@
+[![Build Status](https://travis-ci.org/adsteel/hash_dot.svg?branch=master)](https://travis-ci.org/adsteel/hash_dot)
+
 # HashDot
 
 HashDot allows you to get and set your Ruby hash properties with a dot syntax.
 
 ```ruby
@@ -23,9 +25,23 @@
 
 ```ruby
 Hash.use_dot_syntax = true
 
 {name: 'Pat'}.name #=> 'Pat'
+```
+
+By default HashDot raises a `NoMethodError` when accessing a non-existent key with the dot syntax. The value of `Hash#default` can be used instead, either globally or per-instance, via:
+
+```ruby
+# globally
+Hash.use_dot_syntax = true
+Hash.hash_dot_use_default = true
+{}.a #=> 'default'
+
+# per instance
+h = Hash.new('default').to_dot(use_default: true)
+h.a #=> 'default'
+{}.to_dot.a #=> NoMethodError
 ```
 
 
 ## Installation