Added support for multiple multi-switch appearing on the same page.
Modified MultiSwitchLM to have its standard behaviour by default.
Moved BestFitLayoutUtils into MultiSwitchLM.
Code clean-up and javadoc.

Patch by Seifeddine Dridi, applied with some modifications.


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_WhitespaceManagement@1585822 13f79535-47bb-0310-9956-ffa450edef68