query-linked directories kinda sorta working
directory renaming screwed up in some way
merge in fix for directory renaming
dynamic dirs working for all but SQL error reporting
replace length field with size
SQL_ERROR created as real file in dynamic directory; however unlinking leads to deep recursion
mv/unlink semantics still screwed up
forbid rm and mv on dynamically-generated paths
fixed bug in flush() that prevented flushing under common circumstances
implemented directory views ("magic directories")
Merge branch 'sql_directories'
Add a schema evolution mechanism.