2.16 released

Quick release before taking on multiple session support.

- Organized the widgets in the preferences dialog with titled borders.
- Use bold text, rather than italic, in the stack panel.
- Implemented RFE 599: source views may now be displayed in a tabbed
  pane, instead of the internal frames.
- Implemented RFE 331: underline static final fields in locals panel.
- Implemented RFE 754: toolbar icons now show border on mouse hover.
- Fixed bug 752: locals panel threw NPE for objects with no fields.
- Fixed bug 753: source view popup menu confused over breakpoints.
- Fixed bug 755: added keyboard mnemonic to the window menu.
- Fixed bug 759: moving toolbar around the main window had problems.
- Fixed bug 762: removing breakpoint group now properly deletes the
  breakpoints contained in that group.
- Fixed bug 764: show class names in the methods submenu of the source
  view popup menu, so it is clear where they are defined.

Enjoy!

n