Plugin changes

- Changed plugin flag "plugin" to plugin_file
- Added click.path for plugin_file flag
- Use click-payh to check file existence
- Enabled relative PATH for plugin_file
- Changed plugin default
- Changed gm_cmms_v1.0.ini
- Removed olf file existence call for plugin
Merge pull request #3 from henrikstranneheim/develop

Plugin changes
Updated setup.py and bumped version
Merge branch 'develop'