Remove expired www/rubygem-gon-rails4

Mark DEPRECATED and set EXPIRATION_DATE to 2018-02-28

Update to 6.2.0

Changes:	https://github.com/gazay/gon/blob/master/CHANGELOG.md
		https://github.com/gazay/gon/commits/master

www/rubygem-gon-rails4: update to 6.1.0

Convert USES=gem:autoplist to USES=gem since autoplist is default

create USES=gem and update rubygem- ports to use it

Note that for now ports still have to have USE_RUBY=yes to use USES=gem

PR:		209041
Differential Revision:	https://reviews.freebsd.org/D6070

Remove ${PORTSDIR}/ from dependencies, categories v, w, x, y, and z.

With hat:	portmgr
Sponsored by:	Absolight

- Add LICENSE_FILE

- Update to 6.0.1

Changes:	https://github.com/gazay/gon/blob/master/CHANGELOG.md

- Add NO_ARCH

- Update to 5.2.3

Changes:	https://github.com/gazay/gon/blob/master/CHANGELOG.md

www/rubygem-gon-rails4: copy port

If you need to send some data to your js files and you don't want to do this
with long way trough views and parsing - use this force!

WWW: https://github.com/gazay/gon

Differential Revision:	https://reviews.freebsd.org/D866
Approved by:	swills (mentor)