Gracefully shutdown workers/threads in case of SIGINT
Merge pull request #2788 from Who828/handle_sigints_for_workers

Gracefully shutdown workers/threads in case of SIGINT
Update thor to
https://github.com/erikhuda/thor/commit/fdb8028dfb85b58861453d524eba6999d9220504
Use the thor debug option instead of the environment variable

Fixes #2790
Merge pull request #2794 from rafaelfranca/rm-debug-config

Use the thor debug option instead of the environment variable
Merge branch 'master' of https://github.com/bundler/bundler
feature 33 is added