update content for TW290b2

HelloThere: fixed some links
WhatsNew: updated description for #159 (cookie handling)
eliminate double inclusion of usejavasaver code

for some reason still not clear, the build inserts the javasaver applet
"loader" code TWICE, which causes Opera to reject the applet entirely!
Merge pull request #25 from ericshulman/master

fix double inclusion of TiddlySaver and update content