Optional debug parameter to see exceptions

Errors are hidden, and it makes things hard to debug. Add a way to get the error information.

Optional debug parameter to see exceptions

Errors are hidden, and it makes things hard to debug. Add a way to get the error information.

bump to 1.18.1

new version 1.18.0

Changes:

* bump version
* sync doc
* bump edown to latest 0.8.4 version

fix changelog date

bump to 1.17.3

bump to 1.17.2

bump to 1.17.1

update changelog

update changelog