Merge branch 'dev' into image-builder

Author: ablaom

examples/boston/README.md

@@ -1,4 +1,10 @@
-The files notebook.* in this directory cannot be executed without the
-accomanying env/ directory, which contains the package environment
-used. 
+# Contents
 
+- `notebook.ipynb`: Juptyer notebook
+- `notebook.jl`: executable Julia script annotated with comments
+
+# Important 
+
+Scripts or notebooks in this folder cannot be reliably exectued without the accompanying
+Manifest.toml and Project.toml files. If the Manifest.toml does not specify a
+`julia_version` in the first four lines, use Julia 1.6.x, where x is any integer.