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 raise SystemExit
fix exit_code to 1
Merge pull request #49 from item4/cli/upgrade

CLI: fix bug at cliche upgrade
add EnvironmentContext to run command
use app_context
test history on travis
Merge pull request #48 from item4/cli/history

CLI: fix bug at setup.py - history
initial commit about python-social-auth
add 2 blank lines
fix wrong docstring
change variable name to lowercase
fix bad config features