* FEAT: Initial work on revision history for assets
The revision history for individual items mostly works, though it shows database ID where it should show asset ID. Recent changes feed isn't yet done.
* FEAT: Initial implementation of asset activity stream
* CHORE: Fix pep8
* FIX: Asset history table 'branding'
* FIX: Individual asset version history is now correctly filtered
* FEAT: Make revision history for suppliers accessible
* CHORE: *sings* And a pep8 in a broken tree...
* Refactored out duplicated code from `AssetVersionHistory
* CHORE: pep8
And another random bit of wierd whitespace I found
Co-authored-by: Matthew Smith <mattysmith22@googlemail.com>
Closes#358
