You can clone with
embed sjanssen's histogram code in a tab (haphazard ugly hacks and a …
make tabs from Histogram and Timeline (darcs commits and a screenshot)
ignore cabal build dir
Probably I could ignore some of _darcs/hashed_inventory, _darcs/index
and _darcs/tentative_pristine, too, but I don't know darcs enough to risk it..
start with the current upstream state