Restored update_*_0.4.x-0.5.p*, modified upgrade.sh for v. 0.5.1
update_config_0.4.x-0.5.py, update_tables_0.4.x-0.5.pgsql:
* restored from tag vmm-0.5 for upgrades from version 0.4.x
upgrade.sh:
* added stuff for 0.4.x cleanups
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