www/py-requests: Update to 2.2.1, Enable STAGE & AUTOPLIST support

- Update to 2.2.1
- Enable STAGE support
- Enable AUTOPLIST support
- Deprecate easy_install target
- Add CONFLICTS against www/py-requests1

PR:		ports/185631
Submitted by:	olivierd

(cherry picked from commit a09ff44960d2ffb8fdc479882a1cc46190f50d15)