Moved "bio" back to "person", but with type-specific storage. People can fight over where such things belong on another day, for now keeping it in "person" has the advantage that the Tcl API is 100% unchanged so moving it to type-specific storage won't break .LRN.
Added upgrade scripts (Oracle isn't correct, yet), removed bogus attribute sql files (PG, for instance, created bio and bio_mime_type but only dropped bio, Oracle had not bio_mime_type_reference at all).