Upgrade to node.js v0.11.10

Unfortunately, due to a bug in aufs, the "npm" symlink cannot be removed
when running "npm install -g npm":

	https://bugs.launchpad.net/ubuntu/+source/linux/+bug/663069

When running with

	sudo docker -s=dev-mapper build -t node.js .

the same error occurs (just a little later)...

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