Make Weld documentation buildable in Maven for the community project and in Publican for the enterprise product.

Pull request https://github.com/weld/core/pull/82 submitted for the following changes:

• moved publican.cfg file from reference to
  reference/src/main/docbook alongside the lang directories

• uncommented brand: JBoss from publican.cfg file

• removed lang="en" from the <book>

• renamed master.xml to Weld_-_JSR-299_Reference_Implementation.xml

• modified the reference/pom.xml to use the
  Weld_-_JSR-299_Reference_Implementation.xml file
  instead of the master.xml file as a base by adding
  <sourceDocumentName> element to maven-jdocbook-plugin
  configuration.

• added the Weld_-_JSR-299_Reference_Implementation.ent file for Publican

• altered the part ids in Weld_-_JSR-299_Reference_Implementation.xml
  to part-# instead of just #, since Publican does not allow ids to
  start with a digit.

• moved the <para> that was outside the last <section> in
  weldexamples.xml, inside the section, since publican does not
  allow trailing paragraphs.