Dropped IE8 support.
Updated README.
Fixed observable when no event types are given as arguments.
Added Cu.move method, to move properties from a source object to
another.

It is different from Cu.mix as it deletes the properties from the source
object (like a "cut & paste" operation)
Support for adl non-multi-version.
Dropped IE8 support. Current code will be on IE8 branch, and will
remain but no longer be maintained.

Merge branch 'IE9-plus'