- Fixed: The height and width of the imageView was read in an incomplete state => images were loaded at a size of 2x1 px.
Rethink the logic of loading an image, because the actual solution is more then dirty!
+ Added jni
+ Added some dummy jni class (will be deleted later)
- Added a first version of the Histogram view => Does not show anything by now :(
~ fixed the HistogramView

Known issues:
- Add a internal padding (looks a bit weird by now)
- Additive blending needs black background => how to avoid this?
- Updates are not made by now => handler should be implemented which updates all views correctly (not only the histogram view