Hide Hooper's initialization from the user

[Lorti]

Is your feature request related to a problem?
When a page is loading the user notices Hooper's initialization. This is especially distracting when using Hooper in infiniteScroll mode, as seen in the official example at https://baianat.github.io/hooper/examples.html#infinite-scrolling. The page is loaded and Hooper transitions from the first slide to the first copy of that slide.

Describe the solution you'd like
Hooper's initialization shouldn't be visible, for aesthetic reasons. For the infiniteScroll mode this might be as simple as setting transition: none; on .hooper-track until the carousel is ready.

Describe alternatives you've considered
Setting visibility: hidden may be an alternative, but it might interfere with the initialization itself, and has to be thoroughly tested. But it could "prettify" all modes, not just infiniteScroll.