public boolean hasAspect(String aspectName) determines if
      the node has the specified aspect.
    Parameters
- String aspectName
 - The name of the aspect whose presence is to be checked for.
 
Returns
Returns a boolean. True if the node has the specified aspect, false otherwise.
Example
    Node node = getTestNode(session, "ClimbingVolcanoes.JPG");
    
    Log.d(TAG, "hasAspect(P:cm:titled): " + node.hasAspect("P:cm:titled"));        
      
      Would return output such as the following:
    hasAspect(P:cm:titled): true