Added JDT settings to LIRE
Created ExplodedChainedDocumentBuilder

We are going to make the stages more explicit (based on methods instead
of just a simple nested loop).

This is a (simple) transformation that we can expect the user to perform
by hand before starting the refactoring.

See #1.
Added explicit processing of DocumentBuilders

Now the processing is more explicit and all the different stages are
apparent.

See #1.