Starting to update the doctrine-extensions chapter
Post editing doctrine-extensions, slug-url, timestampable and custom-repository-query
Post editing many-to-many-relationship, using-many-to-many using-many-to-many2 and attend-event-ajax (actually, this last one still needs to be completed)
Merge remote-tracking branch 'origin/episode2' into episode2

* origin/episode2: (105 commits)
  Update metadata.yml
  adding all the new chapters to the file
  Tuts: Updating steps on compile
  TutsHero: Merge branch '_tuts/episode2/manytomany-avoiding-dups-with-hasattendee' into '_tuts/episode2/manytomany-add-unattendaction-and-link' as we walk forward through the steps
  Filling in the unattendAction and adding a link to it
  TutsHero: Merge branch '_tuts/episode2/manytomany-print-attendees-on-homepage' into '_tuts/episode2/manytomany-avoiding-dups-with-hasattendee' as we walk forward through the steps
  Merge branch '_tuts/episode2/tostring-adding-tostring-method' into _tuts/episode2/manytomany-avoiding-dups-with-hasattendee
  TutsHero: Merge branch '_tuts/episode2/tostring-adding-tostring-method' into '_tuts/episode2/manytomany-avoiding-dups-with-hasattendee' as we walk forward through the steps
  Merge branch '_tuts/episode2/tostring-adding-tostring-method' into _tuts/episode2/manytomany-avoiding-dups-with-hasattendee
  Adding hasAttendee and using it
  Printing out attendees # on index page
  Tuts: Updating steps on compile
  TutsHero: Merge branch '_tuts/episode2/tostring-adding-tostring-method' into '_tuts/episode2/manytomany-avoiding-dups-with-hasattendee' as we walk forward through the steps
  Merge branch '_tuts/episode2/tostring-adding-tostring-method' into _tuts/episode2/manytomany-avoiding-dups-with-hasattendee
  Adding hasAttendee and using it
  TutsHero: Merge branch '_tuts/episode2/tostring-printing-out-specific-property' into '_tuts/episode2/tostring-adding-tostring-method' as we walk forward through the steps
  Merge branch '_tuts/episode2/tostring-printing-out-specific-property' into _tuts/episode2/tostring-adding-tostring-method
  Adding a __toString method to User
  TutsHero: Merge branch '_tuts/episode2/manytomany-add-link-to-attend' into '_tuts/episode2/tostring-printing-out-specific-property' as we walk forward through the steps
  Merge branch '_tuts/episode2/manytomany-add-link-to-attend' into _tuts/episode2/tostring-printing-out-specific-property
  ...
Removing and tweaking some sections