This reverts commit 8c085f4055.

This reverts commit d0c38ece31.

This reverts commit cf5f4df48a.

This reverts commit b1794add89.

This reverts commit 6d12ef7968a484eb95802411c277260c3b867c5b, which restores
commit df4c45dd33.

This reverts commit df4c45dd33 temporarily to
push a new point release.

This fixes a silent error for iOS; WebGL texture size limit also applies to
canvas dimensions.

This is needed for iOS 13+ for device orientation mode to work.

* Add scale option to hot spot

When `true`, the hot spot is scaled to match the fish eye effect of the image.

Hot spots then appear to be embedded in the panorama instead of floating on top.

This regression was introduced in 12516e69b9.

* Add optional pitch argument to startAutoRotate

Before starting rotation, the viewer is panned to `pitch`.

If pitch is not specified, origPitch will be used

This resolves pixelation issues on some mobile devices (fixes #725).
It also may be related to issues #301, #496, #683, and #708.

For three event listeners added to the container elements weren't being
removed properly, since `removeEventListener` was mistakenly being called on
`uiContainer` instead. This was preventing garbage collection.

Add `stopMovement` to stop all movement

This allows for equirectangular images on a given device to be twice as big as
they were previously, so (almost) all devices now support equirectangular
images up to 8192px across.

This technique could be extended to double the maximum size again (using eight
textures), but images bigger than 8192px should be converted to the
multi-resolution format anyway, so there's little point in implementing this
extension.