Release 1.15.0

Merge pull request #251 from IvanJosipovic/dev

New Features
- Server side data loading! (thanks @nadais)
- Toggle detail template programmatically (thanks @NilsPur)
- Custom Row (thanks @NilsPur)
- Add property ShowChildContentAtTop (thanks @obie73)

Additional Localization
- Danish (thanks @KBBA)
- Spanish (thanks @ekuhlmann23)
- Brasilian Portuguese (thanks @carlos-sergio-carvalho)