Provide the ability to host individual update streams for any package at SqueakMap. Right now, this relies on a hack in the package description which has to include the following lines somewhere: [loadUpdatesAt: http://isgwww.cs.uni-magdeburg.de/~raab/squeak/packages/SMUpdateStreams][storeUpdatesAt: ftp://raab@luxator.cs.uni-magdeburg.de/~/public_html/squeak/packages/SMUpdateStreams]