Split dev-v2 code out into ltool library

[oubiwann]

Use this:

$ git checkout master
$ for TAG in `git tag`; do git deltag $TAG; done;
$ git ls-files > keep-these.txt
$ git filter-branch --force --index-filter \
  "git rm  --ignore-unmatch --cached -qr . ; \
  cat $PWD/keep-these.txt | xargs git reset -q \$GIT_COMMIT --" \
  --prune-empty --tag-name-filter cat -- --all

$ rm -rf .git/refs/original/
$ git reflog expire --expire=now --all
$ git gc --aggressive --prune=now

Taken from:

• https://github.com/lfex/lutil/issues/31
• this stackoverflow answer

[oubiwann]

This code has been copied here:

• https://github.com/lfex/ltool

It should be removed from the dev-v2 branch. Or maybe even delete that whole branch? Or just keep the glue code around? And the template files.