0.11.9

Apply `overflow: hidden` when using the slide commands. Closes #260.

Sequence (UI pack effect) options object no longer gets externally
modified by Velocity. Closes #265.

Fixed bug where tweens would jump when dequeuing custom queues. Closes
#262. (The reverse command now only applies to the default effects
queue; reverse cannot be used with custom queues or parallel queueing
(queue: false).)

Fixed unit conversion bug on the `x` property of SVG elements.