Extensions: Fix options and allow passing functions to the `end_command`#48

Merged

jmwohl merged 2 commits intoOpenframeProject:masterfrom

jvolker:fixExtensionOptions

Sep 28, 2019

Commits on Sep 23, 2019

Adds option to pass functions to the `end_command` in extensions. Closes #43
jvolker
committed

Commits on Sep 24, 2019

Aligns artwork property name with database. Fixes #47
jvolker
committed