Next-release-change-list.md

+* improved logging for fetching/loading: error handling, info, and debug messages
+* binning of fetch requests
+* minor fixes to plot2D
+* minor changes to fetch tests and CI
+
+# Changes to existing modules from release v1.0.0:
+
+ * `Ocean::__init__`: the centre point of the geographic bounding box is computed and used as the origin for the x-y coordinate systems of all the interpolators. (The old implementation did not enforce a common origin for the interpolators, which is obviously problematic.) Obs: the origin is set *after* having initialized the interpolators, whereas it would be preferable to pass it as an input argument to the constructor; however, I could not figure out how to do this.
+```python
+        # enforce common origin for interpolators
+        for _,i in self.interps.items(): i.origin = self.origin
+```
+  
+ * `Ocean`: added class attributes `origin` and `boundaries`
+
+ * `Ocean::bathy_deriv_xy`: fixed a couple of bugs related to naming of input arguments
+
+ * Added new plot methods to `plot_util.py`
+ 
+ * Improved handling of interpolation on irregular grids (automatic determination of bin size for the regular grid onto which the data is mapped)
+
+# New modules in the `sound` folder:
+
+ * parabolic_equation.py
+ * sound_speed.py
+ * geophony.py
+
+# New tutorials:
+
+ * Tranmission loss tutorial
+ * Geophony tutorial
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