Parameterize db *nix user instead of 'opscode-pgsql'

Conflicts:
	README.md
	files/private-chef-cookbooks/private-chef/recipes/default.rb
	files/private-chef-scripts/gather-logs
	files/private-chef-upgrades/001/014_upgrade_migration_schema.rb
	files/private-chef-upgrades/001/016_add_org_tables_osc_hash_types.rb
Revert to 11.1 README
Clean up gather-logs
Merge pull request #493 from opscode/pdb/11.1_dbUnixUser

Pdb/11.1 db unix user