pep8 as much as possible w/o touching the code

[minusf]

this is a bit of an ocd PR, but i find the additional whitespace gives a bit more breathing space :]

remaining violations:

sqlite_web.py:59:1: E402 module level import not at top of file
sqlite_web.py:59:1: F403 'from peewee import *' used; unable to detect undefined names
sqlite_web.py:60:1: E402 module level import not at top of file
sqlite_web.py:61:1: E402 module level import not at top of file
sqlite_web.py:62:1: E402 module level import not at top of file
sqlite_web.py:428:36: F812 list comprehension redefines 'field' from line 419

no hard feelings if you ignore this PR, i'll just disable the checks in vim.

[coleifer]

I fixed the unused variable and the buf= line, but I'm not going to merge the other changes.