UAS. Allow it to fetch from release info as well

[ukdtom]

Change UAS, so it'll check/update from both Master thread, as well as from the Release

[ukdtom]

Since the UAS Repo already contains the unused value named:
"branch" : "master"

I take it we could use something like:
"branch" : "release"

or if people want to use the Git Release API to grap download count, the branch could also be:

"branch" : "release/Name_Of_Asset"

[ukdtom]

And if browser_download_url is not found, then simply grap the zipfile

[ukdtom]

Ohhhhh.....And when checking for update timestamps, we need to make sure we check the correct place as well

[ukdtom]

Awaits issue 120