v1.21.0

In this release new widgets are added and existing widgets are improved a lot.

• Table widget now displays formatted float value, which looks better than the default setting. Also, many functions are implemented.
• Many improvements in figure canvas. It is now highly interactive and subplots are nicely cooperating.
• Logger widget. Opened only when ip.gui.bind is called and when logger is accessed via ip.gui.log.
• Explorer widget. Open in "File" menu or "Ctrl+Shift+E".
• Text file viewer widget. Added when a txt file is opened in the explorer widget.
• Layer duplication ("Ctrl+Shift+D") and layer projection ("Ctrl+P") now work for any basic layers. However, they dropped support for the case in which multiple layers are selected.
• ip.gui.bind now can make custom functions with parameter inputs. It automatically adds a parameter controller widget to the active viewer.
• ip.gui.bind now has access to the table widget and the log widget in the viewer.
• ip.gui.goto method makes it easier to change the current slice.
• LabeledArray now inherit copy (not pointer) of metadata from previous array.
• Call pandas.read_csv and directly convert it to table.
• ip.imread_collection can read images from list of paths.
• Some exception of physical scale in Micromanager 's ome.tiff is now considered in ip.imread.