Fix grammar?
part01: recommend Anaconda Python + PyCharm
gc3.sty: Do not show string space in code formatted with `lstlistings`
Revised part02 for the June 2014 course.
Revised part03 for the June 2014 course.

Variadic and kwargs functions have been removed
and stored into a file `ATTIC/variadic-and-kwargs-functions.tex`
in case we want to resurrect them at a later stage.
Revise part04 for the June 2014 course.
Revise part 05 for the June 2014 course.