[#68387788] created url repository and url shortener classes with method to shorten urls

Signed-off-by: Andrew Deitrick <ajdeitrick@gmail.com>
[#68387788] shorten method now returns hash with two key value pairs

Signed-off-by: Andrew Deitrick <ajdeitrick@gmail.com>
[#68387788] user can submit a link to be shortened
the original and shortened urls will be displayed on a stats page

Signed-off-by: Andrew Deitrick <ajdeitrick@gmail.com>