Fixes comments, tidies whitespace.
Fixes edge-case bug which made it impossible to clear a dynamic backgroundColor.
Updates SC.Color with writable cssText and an error state. Includes unit tests.

Note that this changes the behavior of SC.Color.from, which previously returned NO for invalid input and now returns an SC.Color in error mode. You should use SC.ok() to test the validity of a created color. This will work both before and after this commit.
Adds 'warn' method to testing suite.
Deactivates SC.ManyArray#supportNewRecord by default. Converts failing unit tests to warnings.
Tweaks primary key behavior in SC.Record#normalize. Fixes bug where it would fail to identify RecordAttribute subclasses. Closes #1127.
Adds escapeHTML to SC.MenuPane
SC.MenuPane now ignores the first item if it is a separator
Updates experimental SC.SelectView for backward-compatibility with legacy view.
Adds SC.Request.manager functions isPending and isInFlight.

Allows checking if a response is in the pending or inflight queues.
Adds a transform that will return YES if the value is equal to equalValue, NO otherwise
Improves SC.Binding documentation. Marks a number of advanced and rarely-used methods private, in an effort to clean up the (rather intimidating) doc page.
Adds unit tests for SC.Binding.equalTo.
Don't forget to call arrayContentWillChange as well when enumerable changes.
Implements SC.SegmentedView#shouldAutoResize, courtesy of @jlaxson. Includes unit tests. Resolves #974.
Clarifies SC.SegmentedView#shouldAutoResize documentation re: shouldHandleOverflow.
Swaps out @jlaxson's SC.SegmentedView#shouldAutoResize for @publickeating's suggestion that the behavior be mediated by setting shouldHandleOverflow to NO. (There is currently no way to prevent resizing in a static-width segmented view with shouldHandleOverflow: NO; if that's a need, it shouldn't be hard to implement.)
Adds some documentation to SC.Binding to clarify the issue raised in #859.
Fixes SC.routes bug where browser history events would trigger history updates, doubling up the history state. Includes really terrible unit test. Fixes #719.
Works around an issue where some browsers may support ProgressEvent without supporting the loadend event.