Merge remote-tracking branch 'remotes/pmaydell/tags/pull-cocoa-20150619-1' into staging

cocoa queue:
 * Add Machine menu, with entries for pause, resume, reset, power down, and
   media change and eject for removable drives

# gpg: Signature made Fri Jun 19 11:24:11 2015 BST using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"

* remotes/pmaydell/tags/pull-cocoa-20150619-1:
  ui/cocoa.m: Add machine menu items to change and eject removable drive media
  ui/cocoa.m: Add Reset and Power Down menu items to Machine menu
  ui/cocoa.m: Add Machine menu with pause and resume menu items

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