title: pyYAML Errors on "!" in a string
body: <p>First, a disclaimer: I'm not too familiar with YAML. I'm trying to parse a YAML doc into Key Value Pairs (don't worry about how I'm doing it. I've got that bit handled)</p>
  
  <p>My file used to look something like:</p>
  
  <pre><code>world:
       people:
            name:Suzy
            address:chez-bob
  </code></pre>
  
  <p>Then, someone went and changed it.</p>
  
  <pre><code>world:
       people:
            name:!$uzy
            address:chez-bob
  </code></pre>
  
  <p>And I get this parse error:</p>
  
  <pre><code>yaml.constructor.ConstructorError: could not determine a constructor for the tag '!$uzy'
  </code></pre>
  
  <p>What does this even mean? How would I go about getting it to just interpret !$ as just two characters?
  I just want a dictionary of string keys and values!
  Also, editing the yaml files is not an option. Problem must be fixed in the code using the parser.</p>