Bugfix release to 2.0. Two changes:
Output the intermediate F values when dumping the intermediate pmf. As a result, if you're not sure how far you need to go to converge, you can set the tolerance to 0 and monitor the intermediate pmfs until they converge. You could do this before, but you'd never get the final F values, which can be useful for some analysis. Requested by Chris Neale.
Fixed an overflow bug in wham-2d, where I wrote one spot past the end of cum. Spotted and diagnosed by Chris Neale.