Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20150715-1' into...

Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20150715-1' into staging

migration/next for 20150715

# gpg: Signature made Wed Jul 15 11:23:33 2015 BST using RSA key ID 5872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"

* remotes/juanquintela/tags/migration/20150715-1:
  migration: We also want to store the global state for savevm
  migration: reduce the count of strlen call
  migration: Register global state section before loadvm
  migration: Write documetation for events capabilites
  migration: Trace event and migration event are different things
  migration: Only change state after migration has finished

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>