Not all courses have the -00x suffix.
See: coursera.org/db
Merge pull request #96 from zamabe/master

Correct behavior when dealing with courses which don't have an -00x suffix.
add a commandline regex parameter to select which weeks to download
use a comma sep list of ints to select weeks instead of a regex
Fixed quote filenames
Merge pull request #99 from capatillo/patch-1

Fixed quote filenames
Merge branch 'master' of https://github.com/dgorissen/coursera-dl