New egg: srfi-225

[Peter McGoron via Chicken-users]

Hello,

I have ported SRFI-225 (Dictionaries) to Chicken 5.
release-info: 
https://files.mcgoron.com/chicken/srfi-225-egg/srfi-225.release-info
documentation: https://wiki.call-cc.org/eggref/5/srfi-225
-- Peter McGoron