add "revision" column to wikipedia_works and celery will crawl articles which has larger revision than last max crawled revision
get revision first and use again
pep8
add EOL, delete useless comment, sort imports
Merge pull request #45 from miaekim/celery

Add revision feature to wikipedia_works
add libsass dependency and libsass support
add bootstrap-sass submodule
base styling using bootstrap and scss
fix wrong submodule and settle branch
add setup.cfg for libsass-python
change submodule git protocol for anonymous access