Added 'python-software-properties' to default required packages to support some of the s3 cmds.
Added firewall recipe.
Added RUBY_GC_HEAP_INIT_SLOTS top default unicorn startup script.
Added types_hash_max_size 2048 to default nginx config to support digital ocean deployment.
Changed unicorn init script to do a full quit and start on 'restart' or 'reload'. 'Upgrade' continues to support in place upgrades.