Added an AUTHORS file.

I used this command to get the list, and I used my brain to eliminate
duplicates, since many people used variations of their names and
addresses to make commits.

$ git log --format='%aN (%aE)' | sort -u
Add a note about the AUTHORS file to the dev docs.
1046160 - taking ownership of /var/lib/pulp/published
the pulp-manage-db command will now exit with a helpful error message when run as root
Merge pull request #799 from pulp/mhrivnak-manage-db-not-root

pulp-manage-db will now exit with an error message when run as root
moving responsibility for /var/lib/pulp/published into the platform's pulp-dev script
Merge pull request #796 from pulp/mhrivnak-1046160

1046160 - taking ownership of /var/lib/pulp/published
also creating the published directory in pulp-dev
Merge branch 'mhrivnak-1046160'
Merge branch 'master' of github.com:pulp/pulp
moving content-type loading to the beginning of the pulp-manage-db workflow, so that migrations can depend on having the latest content types loaded.
Merge pull request #801 from pulp/mhrivnak-reorder-managedb

moving content-type loading to the beginning of the pulp-manage-db workf...
1058835 - Fix documentation of URL path for deletion of upload requests.
Resort the AUTHORS list by last name.
Merge branch 'rbarlow-authors'
Merge pull request #802 from pulp/barnabycourt-1058835

1058835 - Fix documentation of URL path for deletion of upload requests.
Merge branch 'master' into distributed-tasks

Conflicts:
	pulp-dev.py
	pulp.spec