initial zoom integration

[FuriousJulius]

trafficstars

small change, we shall see if the zoom needs to be augmented for tilt enabled systems. Basic idea is FE already grabs zoom from the SV urls (if that's how they are being added) and can easily send it along as an assetAttribute. assetAttributes get picked up by the director api and converted to elements in the activity_config. All we are doing now is taking them (if they exist) instead of using the maths involving FOV.

[sourcelevel-bot[bot]]

SourceLevel has finished reviewing this Pull Request and has found:

• 432 possible new issues (including those that may have been commented here).
• 208 fixed issues! 🎉

But beware that this branch is 319 commits behind the EndPointCorp:master branch, and a review of an up to date branch would produce more accurate results.

See more details about this review.