new_hash - designates if this is the first time this long_url was shortened by this user.
The return value will equal 1 the first time a long_url is shortened. It will also then be added
to the user history.
hash - a bitly identifier for long_url which is unique to the given account.
long_url - an echo back of the longUrl request parameter. This may not always be equal to
the URL requested, as some URL normalization may occur (e.g., due to encoding differences, or case
differences in the domain). This long_url will always be functionally identical the the request
parameter.
global_hash - a bitly identifier for long_url which can be used to track aggregate stats
across all Bitlinks that point to the same long_url.
url - the actual Bitlink that should be used, and is a unique value for the given Bitly
account.