Flickr.api2

* Added support for shortened URLs from photos

* added url_o support
* Update dependencies entry in README
* Add test for searching by utf8 tags
* Adjusted metadata

* Fixes for UTF-8 encoded parameters.
* Automatically retry API calls if they time-out.

* Skip online API tests unless HTTP access is available.
* Adjust Makefile META info regarding Perl versions.
* Minor other test improvements.
* Use test_requires instead of build_requires in Makefile.

* Added missing dependency upon JSON.

* Initial version, forked from Flickr::API 1.04