Expand set of evaluation metrics

[hhegre]

Write a function that returns and tabulates/visualizes an expanded set of standard evaluation metrics for the fatality predictions.

The candidates I am considering are:
RMSE based on log(Y+1)
RMSE based on Y
RMSE based on log(Y+c) where c is another constant than 1 (0.1, 0.01, ...)
RMSE for non-zero actuals - based on log(Y+1)
RMSE for zero actuals - based on log(Y+1)
Average precision for predictions collapsed into categories
Some calibration metrics from the prediction competition
Some metrics based on aggregate data (e.g. distance from global mean)

-- if anyone has other suggestions, please shout out. Also, I would like to get hold of some of the presentation code from the prediction competition.