routr 0.4.1

• General upkeep

routr 0.4.0

• Add get_handler() method to Route (#9, @cpsievert)
• Add root field to Route which will get appended to all paths before
  matching to an incomming request
• Add remap_handlers() to loop through all handlers and reassign them based on
  a user provided function. (#8)
• Added pkgdown site at https://routr.data-imaginist.com

routr 0.3.0

• Add on_error() method to modify how errors are handled. The default is now
  to return 500 without any body and print the error message with message().
• Modified on_attach() method that uses the new logging system to log route
  errors.