Merge branch 'testing' of gitorious.org:statusnet/mainline into testing

Merge branch 'testing' of gitorious.org:statusnet/mainline into testing

* 'testing' of gitorious.org:statusnet/mainline: (63 commits)
  Add a scary 'experimental feture' warning & are-you-sure prompt on moveuser.php
  fix wrong datatypes (saving string instead of array) in AtomPub notice processing
  Account moving is a background activity
  return a 409 Conflict when subscription already exists
  OStatusPlugin does discovery in Profile::fromURI()
  considerably more logging and error checking in AccountMover
  add a log method to AccountMover
  normalize accounts and check for return in HTTP for moving
  move account-moving classes to their own libraries
  execution protection on discovery.php
  PHPCS discovery.php
  Move discovery library from OStatus plugin to core
  Revert "Revert "0.9.7alpha1""
  first example of moving a user
  Parse properties of links in XRD files
  Add the Atom username to the XRD output
  preserve activities in object
  let callers pass in an XMLOutputter to output to
  execution protection on discovery.php
  PHPCS linkheader.php
  ...