unix function call fts
Merge branch 'master' of github.com:styx-hy/codelib
combine with previous codelib repo

c/cl_fts.c: `fts' call which traverses a file hierarchy
go/mailthem: used in TA work to send mass emails to students
perl/md2post: transform a markdown file into jekyll style form
perl/vmem: read data from binary log and try to visualize it