[yt-dev] Issue #1124: [experimental] update VR docs with present use of rotation/yaw/move iterators (yt_analysis/yt)

[Cameron Hummels]

New issue 1124: [experimental] update VR docs with present use of rotation/yaw/move iterators
https://bitbucket.org/yt_analysis/yt/issues/1124/experimental-update-vr-docs-with-present

Cameron Hummels:

zoomin() rotation() etc were replaced with iter_zoom(), iter_rotate(), etc.  the narrative docs need to reflect this.