Adding a note about AcmeDemoBundle and security!
Adding a copy of the old episode3 files
Proofing index and doctrine-relationship (which was renamed from more-security)

Also created better-fixtures with the rest of doctrine-relationship (which is most of it)
Renaming chapter
Proofind through several more chapters
Adding a cautionary note

Don't try to call app.user.username if the user is not logged in
Removing stuff that's been moved