better handling of the settings object
reenabled the extending of existing settings object
Better timing for when the className property is applied.  Fixes #565
prevent potential background flash if #cboxLoadedContent has been given a background value.  Fixes #567
removed notes about IE7
fixed regression involving hrefs and inline content
minor cleanup
v1.5.0
removed any default margin and padding from Colorbox's iframe.  Fixes #564
Fixed regression that broke direct calls to Colorbox, ie. $.colorbox(…)
Added svg to image types regex
Added access to settings object in callbacks.
Fixed potential issue where IE9+ wouldn't close the modal when clicking on the overlay.  Fixes #576
Add support for a per-image copyright notice, stored within a .copyright element within the linked element.