TODO
====

* list minimum `requests` required, otherwise there is an issue on urllib3 versions
* ensure tests cover: localfile, FileReadArgs, FileWriteArgs

-

* the optimization should allow for configuration and not follow the global method
* The resize functions (constraint methods) should be moved to an extensible and customizable system.
* resize animated images
* gifsicle - check output of interlace and non-interlace options
* More TESTS!
