Usage:
this package provides commands to do url shorten and expand:
   M-x goo-url-shorten
   M-x goo-url-expand
   M-x bitly-url-shorten
   M-x bitly-url-expand
   M-x dwz-url-shorten
   M-x dwz-url-expand
   M-x 126am-url-shorten
   M-x 126am-url-expand