invert brushUp and brushDown in Basics.html to match the explanation (and rerun po4a)
BDR: fix indication in python (there is no run function in there)
BDR: true is True in python
Port BDR2 to python and retranslate everything

There is no switch case in Python, and the pythonish equivalent is a
bit too complex at this point of the lesson. So, instead, don't push
any new construct in this exercise. It becomes a sort of free exercise
and that's it.
Merge branch 'master' of git://github.com/oster/JLM

Conflicts:
	lib/l10n/fr.po
	lib/l10n/jlm.pot
	src/lessons/sort/bubble/AlgBubbleSort3.fr.html
	src/lessons/welcome/BDR.fr.html
	src/lessons/welcome/LoopDoWhile.fr.html
	src/lessons/welcome/LoopFor.fr.html
	src/lessons/welcome/MethodsArgs.fr.html
	src/lessons/welcome/MethodsPicture.fr.html
	src/lessons/welcome/MethodsPicture2.fr.html