* created a new method which is called only once by LineLM.getNextBreakPoss() and...

* created a new method which is called only once by LineLM.getNextBreakPoss() and subsequently calls findBreakingPoints() with different parameters until a set of breaking point is found

* renamed lastDeactivatedNode -> bestDeactivatedNode, and updated only if the node to deactivate is "better" than the old one (may need some fine-tuning)

* instead of the fallback() method, which created only one lineBreakPosition, a
new algorithm is used if Knuth's fails

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@198196 13f79535-47bb-0310-9956-ffa450edef68