push-annex-sunbase: Create and remove the sunbase remote

Just to do it properly.

1db161a6-f1c5-11e3-906d-c80aa9e67bbd
Add ga-other, reads filenames from stdin

92207a90-f1c5-11e3-8156-c80aa9e67bbd
ga-other: Remove filename to avoid duplicates

34ad1276-f1f0-11e3-9b8f-c80aa9e67bbd