Minor corrections in Traversal with SQLA.
Some more correction in Traversal with SQLA.
auto-generate 'current' copyright year

Also, show some slight PEP-8 love.
various grammar improvements, and a typo fix
a few more fixes
Merge pull request #63 from tshepang/bunch

grammar and typos
Merge pull request #62 from tshepang/update-copyright

auto-generate 'current' copyright year
Merge pull request #59 from Cito/master

Minor corrections in Traversal with SQLA.