Node.js is generating wrong hash values.
Thanks to chiari.show for both notifiying and supplying a patch.
http://blog.arduino.cc/2014/05/06/time-to-expand-your-yun-disk-space-and-install-node-js/
yun-scripts had upgrade-all script but it wasn't installed
Updated node packages
ImageMagick: added missing binaries from ipk. Fixes #5
imagemafick: forgot to increase PKG_RELEASE
run-avrdude: reviewed to make it less likely to fail. Fixes #9
yun-scripts: adding extract-built-date and extract-built-date-from-sysupgrade-image scripts
yun-scripts: umount needs -d flag, otherwise it won't free the previously created loop device
arduino webpanel: upgrade to 1.3
arduino webpanel: upgrade to 1.4
yun-scripts: added kmod-loop as dependency