Automate reddit_image_downloader on OS X with launchctl/launchd

com.bloudermilk.reddit_image_downloader.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>com.bloudermilk.reddit_image_downloader</string>
    <key>ProgramArguments</key>
    <array>
      <string>/Users/bloudermilk/.rbenv/versions/1.9.3-p327-perf/bin/ruby</string>
      <string>/Users/bloudermilk/.rbenv/versions/1.9.3-p327-perf/bin/reddit_image_downloader</string>
      <string>--subreddits</string>
      <string>EarthPorn</string>
      <string>--destination</string>
      <string>/Users/bloudermilk/Pictures/Wallpapers</string>
      <string>--min-width</string>
      <string>1920</string>
      <string>--min-height</string>
      <string>1080</string>
      <string>--max-age</string>
      <string>1</string>
    </array>
    <key>Debug</key>
    <true/>
    <key>StandardErrorPath</key>
    <string>/dev/null</string>
    <key>StandardOutPath</key>
    <string>/dev/null</string>
    <key>StartInterval</key>
    <integer>10800</integer>
    <key>RunAtLoad</key>
    <true/>
  </dict>
</plist>