Cappuccino Cappuccino

CPPopover fixes/enhancements

• Lion-style popovers now zoom open just like their Lion counterparts (except for opacity, the browser couldn't handle that at the same time).
• Fixed a number of subtle drawing issues caused by not aligning path points correctly.
• The anchor arrow deals correctly with corner cases where the middle of the reference rect is not within the corners of the popover.
• Code cleanup: factored redundant code, removed unused code.
• Added corner cases to the demo app, changed demo app to reuse a single popover. https://github.com/cappuccino/cappuccino/commit/1a8fc7f07f7522ea0d9...