Release 0.1.6

[0.1.6] - 2019-09-18

• Switch to python multithreading (#1544)
• Don't waste memory/compute in preserve_float_range (#1545)
• Get rid of shared state for LocalMaxPeakFinder (#1541)
• map filter (#1520)
• funcs passed to apply and transform can use positional arguments (#1519)
• import SegmentationMaskCollection in main starfish (#1527)
• Enable Windows builds on master (#1538)
• Throw a warning when the data size is unusual. (#1525)