ScriptNode getPerson(username) returns a single (cm:person)
      node associated with the specified user name, or null if the person does not
      exist.
    Parameters
- username
- A string representing the user name for the user who is being fetched.
Returns
A node representing the user requested, or null if the username cannot be found.
Example
The following code snippet returns the node object for the user with the username abeecher:
model.user = people.getPerson("abeecher");  
      
    