delayDuringOutInTransitions seems to lag

[IanLunn]

When delayDuringOutInTransitions is true, there seems to be a 1 second lag between being about to change frames

[IanLunn]

The 1 second delay was defined in the themes CSS. Sequence.js waits for a transition/animation to complete before it sees the frame as being finished. I've written an if statement that will cause Sequence.js to only wait for a transition to end if the transition duration is not returned as "0s" (0 seconds).

Will need to test if this causes issues where a theme developer may have omitted a transition duration by mistake.

[IanLunn]

Bypassing the wait for a transition/animation to end allows a user to skip through frames before they've finished. Taken this out for the time being (may be useful for future features) and managed to get around the lag using just CSS.