Added yowsup as a submodule.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
Added __init__ and .gitignore files to yowsup.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
!whatsapp: Use WhatsApp to send a message to a user.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
!sms: Added option for smsmode=WhatsApp.
Signed-off-by: Martin Stone <martin@d7415.co.uk>
Removed !whatsapp as it was a nasty hack.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
Added 1000scans.txt to .gitignore.
Signed-off-by: Martin Stone <martin@d7415.co.uk>
Allow smsmode=email or whatsapp without sms mode combined in merlin.cfg.

Signed-off-by: Martin Stone <martin@d7415.co.uk>