Added file upload support

16:00-23:30 (approx)

• Wrote php form for file uploading (uploadmgr.php) and for accepting the uploaded file (upload.php)
• Wrote javascript routines so that file upload manager is spawned when the image to upload is clicked. (Took a long time, since I needed to learn the javascript.)

Behavior of the upload manager

• img "alt" property is replaced (java onload function) by "click to upload" to give a cheesy tooltip in IE. (This required adding a "name" property to uploadable images. I don't like this.)
• img "onclick" added to launch the upload manager.
• May add red border to editable pictures in admin mode.