INT-2768 Add XSLT Transformer Factory Class Name

Add the ability to inject the class name of the xslt transformer
implementation.

https://jira.springsource.org/browse/INT-2768

-add @author to java docs
-updat copywrite year to current year

add new test and check for class name that it exists.

-fix xslt payload transformer and test for unknown class name, will
now default to the jre default transformer.
INT-2768: Add BeanClassLoaderAware
INT-2768 Polishing - Docs, White Space

Add what's new; fix white space in test case.
Merge pull request #897 from mbazos/INT-2768

* INT-2768:
  INT-2768 Polishing - Docs, White Space
  INT-2768: Add BeanClassLoaderAware
  INT-2768 Add XSLT Transformer Factory Class Name