Pokepy

* Add `version` subproperty to `FlavorTextSubResource`

* Fixed disk-based cache not handling different filesystems on Windows

* V2Client get methods now return element instead of single element list
* set urllib3 version to >=1.24.3, <1.25 (CVE-2019-11236)
* Support for Python 3.4 and 3.5

* Fixed bug that caused pokemon_encounters subresource to not be detected in LocationAreaResource
(thanks to [jachymb](https://github.com/jachymb))

* New V2Client cache-related methods:
* cache_info
* cache_clear
* cache_location

* Pykemon is now Pokepy!
* Cache (disk- and memory-based)