You can clone with
HTTPS or Subversion.
I'm pleased to announce that parsing of LOOP's "for-as-arithmetic" is now a solved problem! This should facilitate transplantation of this great feature in other constructs.
Quicklisp should pull from the tarball: http://www.hexstreamsoft.com/projects/parse-number-range/parse-number-range_latest.tar.gz
Project's home: http://www.hexstreamsoft.com/projects/parse-number-range/
Github page: https://github.com/Hexstream/parse-number-range