Bugzilla #49913:

Bugzilla #49913:
Initial code drop for support of rounded corners.
Submitted by: Peter Hancock <peter.hancock.at.gmail.com>

Changes to patch:
- Java 1.5 methods eliminated
- Some (not all!) Checkstyle violations fixed.
- Fixed some excessive and missing whitespace
- paintCornersAsBitmap() in AFPPainter was missing a call to ImageSize.calcPixelsFromSize()
- Made AT representation of border traits cleaner
- Added a TODO for table borders (inner and outer versions)

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_RoundedCorners@1003020 13f79535-47bb-0310-9956-ffa450edef68