Simplified the expiry date logic to catch bug #35.

Leaving the expiry date at 22 January until the fix is confirmed.
set expiry to Jan 29th
upgrade to jnotify 0.94 which supports 64-bit platforms
- we select the architecture by a slight hack. windows systems prefer the names "x86" and "x86_64" and also don't support symlinks, so use symlinks for the unix names "i386" and "amd64".