[git] Don't ignore ./bin anymore because Rails 4+ uses it for binstubs that should be in src control
[bundler] add configuration for nokogiri so it compiles against homebrew libiconv
Remove postgres.app from ./bin:/usr/local/bin:/usr/local/mysql/bin:/usr/local/share/npm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/swrobel/.bin:/Users/swrobel/.go/bin