Merge from Matthew. datamanager.simplesave fix

Added: vCard plugin: mod_vcard

Added: mod_register now replies with an error stanza when file write fails

Added: Datastore support for hosts and global data in addition to users

Fixed routing for IQs to bare JIDs, and added a simple IQ validity check

Fix for saving tables with non-string keys

Merge roster fixes from waqas

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mercurial