Remove support scripts for uploading to GoogleCode

GoogleCode's support for uploads went the way of the Google Reader.
Makes you wonder what GoogleCode is good for, really. Probably going
bu-bye altogether, soon. Guess we should have clicked more ads.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Rewrite upload-to-github.sh for current GitHub API

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>