Merge pull request #184 from atlasapi/mbst-8053-reorder-sources

Remap source availability
Add v4 alias block to simple model

A new annotation has been added, V4_ALIASES, since this block
may be confusing for general use, and is only of use to Voila
so that it may use new-style aliases.
Fix formatting on simple Aliased - no functional change
Merge branch 'mbst-8137-add-v4-aliases-for-pa-films' into stage