4.8.0

• add res.sendFile
  • accepts a file system path instead of a URL
  • requires an absolute path or root option specified
• deprecate res.sendfile -- use res.sendFile instead
• support mounted app as any argument to app.use()
• deps: qs@1.0.2
  • Complete rewrite
  • Limits array length to 20
  • Limits object depth to 5
  • Limits parameters to 1,000
• deps: send@0.8.1
  • Add extensions option
• deps: serve-static@~1.5.0
  • Add extensions option
  • deps: send@0.8.1