(PATCH) Expose FastInfoset serializer tuning properties

The FastInfoset StAX serializer provides several tuning properties that are inherited from the FastInfoset Encoder class:

http://java.net/projects/fi/sources/svn/content/trunk/code/fastinfoset/src/main/java/com/sun/xml/fastinfoset/Encoder.java

Several of them have uses in performance tuning.

The attached patch exposes those properties on the FIStaxOutInterceptor and FastInfoset configuration facilities - the FastInfosetFeature bean (used in cxf:bus XML configuration) and the @FastInfoset annotation.

The patch is made against the 2.6.x branch, but should also work on trunk.