ds 6.x-2.0

- #1375990 by xtfer: Fix function field types called from code
- #1412028 by iankp: Fix an issue where region styles were not output
- Fix a PHP notice when ignored fields are not actually present on the object
- Fix broken multigroup list formatter
- New inline field formatter
- New comma separated list formatter for multigroup subgroups
- Make sure fields in multigroups get passed through DS for theming
- Minor performance improvements
- Show real field names in Layout UI
- Fix an issue where incorrect values were passed to the multigroup list theme
function
- New function to get element children

Known Issues:
- Tabs support is broken