add staging recipe, configure unicorn

don't include MailPreview class unless in development

ensure vendor fonts are precompiled correctly

working towards configuring capistrano for deployment

ensure unicorn pids directory exists

clean up environment deploys

some cleanup

tweak postgres recipe

need to specify database password

update readme for deployment instructions

use environment variables for capistrano configuration

further adjust postgres recipe

allow recipe to override postgres auth method

remove vagrant warning

separate unicorn configs

allow users to easily override deployment options

fallback to root