Refactor origin-revision layer
Remove hash_to_hex
usage in the revision-content layer
It was only used for debug messaged and it's now replaced by bytes' hex
method.
Add history graph structure to be used in the origin-revision layer algorithm
Also all uses of hash_to_hex
were removed from the graph module in favour
of bytes' hex
method.
Refactor origin-revision layer algorithm to use the new history graph structure
Depends on !43 (closed)
Migrated from D5886 (view on Phabricator)