improved chart plotting
proper treatment of utf-8 --HG-- extra : rebase_source : 9cffa7b3292e0b6eca9e0e4aa9465787e556cc4b
more standard hash-bang (python *is* canonical according to Admin/PLATFORMS);
churning pie charts (with non-canonical prerequisites!) --HG-- rename : Admin/churn => Admin/lib/Tools/churn