Update README.md

Added data loading command.
Fixes #9
Merge branch 'master' of github.com:codalab/codalab
Merge branch 'master' into beaudev
Removed extraneous fields from signup
Added first test
Work in progress: Some provisioning and deployment config
Updated config gen and added some config templates
Added runserver and runserver.bat to use generated environment variables
Added environment to supervisord