ImageItem.getHistogram is more clever about constructing histograms:   - integer dtype images now have integer-aligned bins, with bin number     determined by a target value   - step size is automatically chosen based on a target image size   - bins and step arguments have default values 'auto'
ImageItem.getHistogram is more clever about constructing histograms:
  - integer dtype images now have integer-aligned bins, with bin number
    determined by a target value
  - step size is automatically chosen based on a target image size
  - bins and step arguments have default values 'auto'

onlyjus/pyqtgraph,vallsv/pyqtgraph,mgraupe/acq4,pbmanis/acq4,nmearl/pyqtgraph,meganbkratz/acq4,onlyjus/pyqtgraph,duguxy/pyqtgraph,gvalentine/pyqtgraph,ericdill/pyqtgraph,ddamiani/pyqtgraph,mpvismer/pyqtgraph,JenSte/pyqtgraph,onlyjus/pyqtgraph,pbmanis/acq4,tropp/acq4,acq4/acq4,nmearl/pyqtgraph,mgraupe/acq4,gvalentine/pyqtgraph,Lx37/pyqtgraph,ddamiani/pyqtgraph,carlomt/dicom_tools,stscieisenhamer/pyqtgraph,mgraupe/acq4,jlombacher/pyqtgraph,welshjf/pyqtgraph,benvermaercke/pyqtgraph,campagnola/acq4,campagnola/acq4,ericdill/pyqtgraph,JenSte/pyqtgraph,mgraupe/acq4,campagnola/acq4,derricw/pyqtgraph,pbmanis/acq4,acq4/acq4,ng110/pyqtgraph,derricw/pyqtgraph,Lx37/pyqtgraph,ng110/pyqtgraph,meganbkratz/acq4,mpvismer/pyqtgraph,petebachant/pyqtgraph,benvermaercke/pyqtgraph,carlomt/dicom_tools,tropp/acq4,campagnola/acq4,meganbkratz/acq4,ericdill/pyqtgraph,jlombacher/pyqtgraph,vallsv/pyqtgraph,acq4/acq4,duguxy/pyqtgraph,benvermaercke/pyqtgraph,tropp/acq4,meganbkratz/acq4,acq4/acq4,welshjf/pyqtgraph,gvalentine/pyqtgraph,pmaunz/pyqtgraph,tropp/acq4,petebachant/pyqtgraph,pmaunz/pyqtgraph,pbmanis/acq4,ddamiani/pyqtgraph,welshjf/pyqtgraph,mgraupe/acq4,stscieisenhamer/pyqtgraph