Update the defaults for droplet creation
Update the defaults for droplet creation

DigitalOcean seems to have changed the ID's of their server
images...this update continues to use:

Ubuntu 12.04 x64 Server (id: 284203, distro: Ubuntu)

As the default image.

I also lowered the default droplet size to 512mb.

petems/tugboat,haihappen/tugboat,Ferada/tugboat,pearkes/tugboat,conorsch/tugboat,Ferada/tugboat,beni55/tugboat,conorsch/tugboat,noma4i/tugboat,haihappen/tugboat,beni55/tugboat,mtbottle/tugboat,noma4i/tugboat