title: PowerShell 2.0 ConvertFrom-Json and ConvertTo-Json implementation
body: <p>I would like to monkeypatch a PowerShell 2.0 environment where the upgrade to 3.0 is not possible at this time.</p>
  
  <p>I am looking for a PowerShell 2.0 script implementation of the <code>ConvertFrom-Json</code> cmdlet and <code>ConvertTo-Json</code> cmdlet that are in PowerShell 3.0.</p>
  
  <p>I am most interested in the <code>ConvertFrom-Json</code>, but <code>ConvertTo-Json</code> would also be nice.</p>