[jdom-interest] lookup for the parser

[Jason Hunter]

Kesav Kumar wrote:
> 
> If it takes time or doesn't take any time why to do those steps every time
> when we can avoid.

Because the code works now and has been heavily tested.  Because
SAXBuilder allows you to change numerous builder parameters after
construction and thus the required change is more than just cutting and
pasting code.  Because this would open the door to synchronization
issues if the same builder were to build two documents concurrently.

-jh-