Fix up so link nodes only have a single child node.
Fix arena NPattr_ADDR to apply to the right node

addr might not be need at all but I left it for now
use 0x0 instead of 0b0 for constants
Cosmetic changes for sizeme_store
make sizeme_graph auto-detect an updated db file
Silence pointless warnings. Tweak the depth=1 hack for ref_loop.
prep 0.13 release