Corrects list as stack's example typo
Merge pull request #9 from JCaselles/master

Corrected typo in Lists as stack example
Corrects students.py example
Link to upstream documentation for default values in functions.
Merge pull request #11 from kumarpraveen/typos

changed numbers with marks
Merge pull request #10 from JCaselles/master

Correction in students.py
Initial commit for Project Structure chapter.
Merge branch 'master' of github.com:kushaldas/pym
Adds missing modules chapter, this will require adding __all__ details later on.
docbook converion typo fixes.
defined string s value