[TASK] Remove deprecated getter
Merge pull request #195 from coding46/ChangeGroupGetter

[TASK] Remove deprecated getter
[DOC] Remove code complexity charts
[TASK] Refactor build process

- add CMS 7 specific configuration files
- drop CMS 6.1 support
- adapt flux build settings to fit in here
Merge pull request #198 from coding46/development

[TASK] Refactor build process