fix obvious bugs found by pyflakes
removed dead code
make flake8 happy
Merge pull request #275 from Kwpolska/master

flake8
fix minor breakage
Merge branch 'master' of github.com:ralsina/nikola
Make most of the conf.py optional
style fixes
make flake8 happy
ask nicer for the title
preparing 5.2
Deleting annoying and ortographically–incorrect line

Signed-off-by: Kwpolska <kwpolska@gmail.com>