v0.4.4

• Support Expiration, HTTPOnly, and Secure flags on cookies (#87). EDIT: see #216 which prevented expiration from working.
• BUGFIX: properly handle named query string and post body arguments in
  mounted subrouters.
• Added support for static sizing of images. @png and @jpeg now accept a
  parenthetical list of arguments that will be passed into the png() or
  jpeg() call. This enables annotations like
  #' @png (width = 200, height=500).
• Enable ByteCompile flag
• Set working directory for DigitalOcean APIs.
• Respect setErrorHandler
• BUGFIX: export PlumberStatic
• Case-insensitive matching on plumber.r and entrypoint.r when
  plumb()ing a directory.
• Support query strings with keys that appear more than once
  (#165)
• Fix the validation error warning at the bottom of deployed Swagger files
  which would have appeared any time your swagger.json file was hosted in
  such a way that a hosted validator service would not have been able to access
  it. For now we just suppress validation of swagger.json files. (#149)
• Support for floating IPs in DNS check that occurs in do_configure_https()
• Make adding swap file idempotent in do_provision() so you can now call that
  on a single droplet multiple times.
• Support an exit hook which can define a function that will be
  evaluated when the API is interrupted. e.g.
  pr <- plumb("plumber.R"); pr$registerHook("exit", function(){ print("Bye bye!") })
• Fixed bug in which a single function couldn't support multiple paths for a
  single verb (#203).