Allow to inherits from Money

Signed-off-by: chatgris <jboyer@af83.com>
Update AUTHORS and CHANGELOG.md

Let's be a good oss citizen. :)

Signed-off-by: chatgris <jboyer@af83.com>
Rename set_upt_default to setup_defaults

Signed-off-by: chatgris <jboyer@af83.com>
Merge pull request #330 from chatgris/inheritance

Allow to inherits from Money