Release v8.0.0
Changelogs:
- Remove "folder" property of configuration file. This is no longer required because spec file path is enough.
- Add "enabled" property of spec object in configuration file. We can now skip some spec without removing the related spec object.
- Create automatically the output directory for "merge" command if it does not exist.
- Add "html-injector" property of configuration file to inject some HTML content into pages of "serve" command.