Please add Quicklisp Stats

[phoe]

A system that fetches and performs basic operations on the Quicklisp download statistics.

https://github.com/phoe/quicklisp-stats

QUICKLISP-STATS> (system-downloads :alexandria 2020 11)
13731

QUICKLISP-STATS> (loop with stats = (month 2020 4)
                       with filtered-stats = (remove-if-not (lambda (x) (< 10000 (cdr x))) stats)
                       for (system . count) in filtered-stats 
                       do (format t ";; ~20A : ~5D~%" system count))
;; alexandria           : 19938
;; cl-ppcre             : 15636
;; bordeaux-threads     : 14974
;; trivial-features     : 14569
;; split-sequence       : 14510
;; closer-mop           : 14482
;; trivial-gray-streams : 14259
;; babel                : 14254
;; cffi                 : 12365
;; flexi-streams        : 11940
;; iterate              : 11924
;; named-readtables     : 11205
;; cl-fad               : 10996
;; usocket              : 10859
;; anaphora             : 10783
;; trivial-backtrace    : 10693
NIL