Add support for uploading TinyOS images. This page now accepts a
'nodetype=mote' parameter to display only the options that matter for a mote. This is implemented much like the menu and the beginexp page, with a $view hash, set from the nodetype argument, that controls showing/hiding different parts of the page. Added a file uplaod box to be used for mote images, which calls Tim's webcopy script to copy the file into place. Doesn't work quite yet - for some reason, even though the call to webcopy is succeeding, the destination file doesn't show up. So we have a little bit of debugging to do still. Not linked in from anywhere yet. Not sure what the right thing is - shoud there be a list at the top of this page of all special nodetypes it supports? Or should we just link it in from the TinyOS tutorial or the mote type pages?