Optimize fetching of a branch changeset. Closes #303
Test added for changed ChangeSieve
Differentiate between "Branch-with-no-file" and "Branch-with-file".
Disabled fetching all files that was branched
Disabled fetching all files that was in rename branch commit
Test fixed
DoesNotFetchBranchedFile test added
More self-explanatory.
:lipstick:
Merge #554.
Release notes for #554