move getIcon() from WorldView to World, that acts as a selector for all sister classes
reindent
BaseballWorldView: some refactoring to make room for other kind of views
cosmetics in comments
historical view for baseball
fix the templating of baseball worlds
fix the templating of this entity
more explicit error message
rewrite PancakeView from scratch, with rather complete mouse interaction
PancakeView: display the amount of moves
fix the translations of the lesson chooser, and translate the engine to 100%
run po4a, translation still to be updated
the baseball exercises are easier than the pancakes ones, I think
Split hanoi towers out in another lesson
Remove the meta lesson. (Fix: #2)

It was not done, seemed difficult to finish, and complicated the code
of the universes.
note the bug numbers that are fixed in the ChangeLog
try to work around the bugs in our translation infrastructure
oops, forgot again to update the po4a conf file
rename files so that different files have different names
Kill HanoiInvalidMove and use IllegalArgumentException instead, as we should