hg: openjfx/8u-dev/rt: RT-34863: clean up CSS cache when Parent is removed from scene-graph. Also, when a stylesheet is added which is already in cache, do a checksum to see if the stylesheet has changed (only for file: urls)

[hang.vo at oracle.com]

Changeset: ae45fbb417cf
Author:    David Grieve<david.grieve at oracle.com>
Date:      2014-02-28 16:01 -0500
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/ae45fbb417cf

RT-34863: clean up CSS cache when Parent is removed from scene-graph. Also, when a stylesheet is added which is already in cache, do a checksum to see if the stylesheet has changed (only for file: urls)

! modules/graphics/src/main/java/com/sun/javafx/css/StyleManager.java
! modules/graphics/src/main/java/javafx/scene/Parent.java