Update translations

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Try to fix null pointer exception to onFling event

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Added Dutch translation

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>