add `case` construct to suppress the go warning.
add shell/cygwin/cygwin with 2 function open() & gvopen().
use new function gvopen() to open new .md file.
Merge branch 'master' of github.com:Mudox/dot-files
zshrc: remove fzf loading line.
shell/hugo: improve hb().
scripts: rm cc_cls.sh, chmod.sh.