Killing off XML_Tree, or bringing it with us to PEAR2

Descision time, people! XML_Tree is used lots. >    * File_XSPF >    * LiveUser >    * LiveUser_Admin >    * Services_ExchangeRates >    * XML_FastCreate >    * XML_FOAF XML_Serializer is the new goodness, but the API changes are reasonable between the two. Lots of the packages which use XML_Tree aren't maintained. Here's the options: 1. Kill it. With fire. Lots of patches / rewriting for the above packages to replace it with XML_Serializer 2. Version bump to package 2.0, lots of feature requests, kill it off slowly but still have it kicking around so pear2 likes it. 3. Kill them all off. Option 1 is my favourite, but the most effort (and look how hard it was to get HTTP_Request2 in place), and needs a migration guide. Option 2 is the most likely, but we'll have all of the dead weight dragging along. Option 3 is just malicious. Who volunteers to help with 1 or 2?