requests-message.py: Call SetPresence to set the contact available which is needed on MSN.
requests-message.py: Call SetPresence to set the contact available which is needed on MSN.

Signed-off-by: Jonny Lamb <3d1fb3642aaab2ff70e3392a5ab916bf99eed6a3@collabora.co.uk>

max-posedon/telepathy-python,freedesktop-unofficial-mirror/telepathy__telepathy-python,PabloCastellano/telepathy-python,detrout/telepathy-python,epage/telepathy-python,epage/telepathy-python,detrout/telepathy-python,PabloCastellano/telepathy-python,freedesktop-unofficial-mirror/telepathy__telepathy-python,max-posedon/telepathy-python