Merge branch 'SIMPLEITK-510_AddUseHistogramsOptionToLabelStatistics' into release

Change-Id: I0e5d3ea297853e6ceb924f82dab7db69dc8083d5
Merge branch 'release'

Change-Id: I76c7016cca8df8a7893ca9f81f5669eddc7cd701
Merge branch 'master' into next

Change-Id: I7e5945b2cef9205316cb8efd1f09bc2393695f55