Vagrant EC2 support, initial version
make Vagrant EC2 security group configurable
error message formatting
updated provisioning scripts to mention Ubuntu 12.04 only (not VirtualBox)
typo
update GRUB only on non-AWS machines
Add support for retrieving subsets by last_processed_stories_id rather than past number.

Commented out old code.
Add API to give information on a single story
Merge branch 'master' into compare_random_gridfs_and_s3_downloads