DOC Update release notes for v0.16.0 (#813)

docs/changelog.md

@@ -2,34 +2,71 @@
 # Release notes
 
 ## Version 0.16.0
-*Unreleased*
+*December 24, 2020*
+
 
-- Pyodide includes CPython 3.8.2
-  [#712](https://github.com/iodide-project/pyodide/pull/712)
 - Pyodide files are distributed by [JsDelivr](https://www.jsdelivr.com/),
   `https://cdn.jsdelivr.net/pyodide/v0.16.0/full/pyodide.js`
   The previous CDN `pyodide-cdn2.iodide.io` still works and there
   are no plans for deprecating it. However please use
-  JsDelivr as a more sustainable solution.
+  JsDelivr as a more sustainable solution, including for earlier pyodide
+  versions.
+
+### Python and the standard library
+
+- Pyodide includes CPython 3.8.2
+  [#712](https://github.com/iodide-project/pyodide/pull/712)
+- ENH Patches for the threading module were removed in all packages.
+  Importing the module, and a subset of functionality (e.g. locks) works,
+  while starting a new thread will produce an exception, as expected.
+  [#796](https://github.com/iodide-project/pyodide/pull/796). See
+  [#237](https://github.com/iodide-project/pyodide/pull/237) for the current
+  status of the threading support.
+- ENH The multiprocessing module is now included, and will not fail at import,
+  thus avoiding the necessity to patch included packages. Starting a new process
+  will produce an exception due to the limitation of the WebAssembly VM  with
+  the following message: `Resource temporarily unavailable`
+  [#796](https://github.com/iodide-project/pyodide/pull/796).
+
+### Python / JS type conversions
+
 - FIX Only call `Py_INCREF()` once when proxied by PyProxy
   [#708](https://github.com/iodide-project/pyodide/pull/708)
-- Updated docker image to Debian buster
+- Javascript exceptions can now be raised and caught in Python. They are
+  wrapped in pyodide.JsException.
+  [#872](https://github.com/iodide-project/pyodide/pull/872)
+
+### pyodide-py package and micropip
+
+- The `pyodide.py` file was transformed to a pyodide-py package. The imports
+  remain the same so this change is transparent to the users
+  [#909](https://github.com/iodide-project/pyodide/pull/909).
+- FIX Get last version from PyPi when installing a module via micropip
+  [#846](https://github.com/iodide-project/pyodide/pull/846).
+- Suppress REPL results returned by `pyodide.eval_code` by adding a semicolon
+  [#876](https://github.com/iodide-project/pyodide/pull/876).
+
+
+### Build system
+
+- Updated docker image to Debian buster, resulting in smaller images.
+  [#815](https://github.com/iodide-project/pyodide/pull/815)
+- Pre-built docker images are now available as
+  [`iodide-project/pyodide`](https://hub.docker.com/r/iodide/pyodide)
+  [#787](https://github.com/iodide-project/pyodide/pull/787)
+- Host python is no longer compiled, reducing compilation time. This also
+  implies that python 3.8 is now required to build pyodide. It can for instance
+  be installed with conda.
+  [#830](https://github.com/iodide-project/pyodide/pull/830)
 - FIX Infer package tarball directory from source url
   [#687](https://github.com/iodide-project/pyodide/pull/687)
-- FIX Get last version from PyPi when installing a module via micropip
-  [#846](https://github.com/iodide-project/pyodide/pull/846)
-- Updated to emscripten 1.38.34
-  [#480](https://github.com/iodide-project/pyodide/pull/480)
-- New packages: freesasa, lxml, python-sat, traits, astropy, pillow, scikit-image, imageio
-- Updated packages: numpy 1.15.4, pandas 1.0.5, matplotlib 3.3.3 among others.
+- Updated to emscripten 1.38.44 and binaryen v86
+  (see related [commits](https://github.com/iodide-project/pyodide/search?q=emscripten&type=commits))
 - Updated default `--ldflags` argument to `pyodide_build` scripts to equal what
   pyodide actually uses.
-- Drop support for serving .wasm files with incorrect mime type.
-- Replace C lz4 implementation with (upstream) javascript implementation.
+  [#817](https://github.com/iodide-project/pyodide/pull/480)
+- Replace C lz4 implementation with the (upstream) Javascript implementation.
   [#851](https://github.com/iodide-project/pyodide/pull/851)
-- New package
-  [pyodide-interrupt](https://pypi.org/project/pyodide-interrupts/), useful for
-  handling interrupts in Pyodide (see project descripion for details).
 - Pyodide deployment URL can now be specified with the `PYODIDE_BASE_URL`
   environment variable during build. The `pyodide_dev.js` is no longer distributed.
   To get an equivalent behavior with `pyodide.js`, set,
@@ -38,12 +75,36 @@
   ```
   before loading it.
   [#855](https://github.com/iodide-project/pyodide/pull/855)
-- Suppress REPL results by adding a semicolon [#876](https://github.com/iodide-project/pyodide/pull/876)
-- Javascript exceptions can now be raised and caught in Python. They are wrapped in pyodide.JsException.
-  [#872](https://github.com/iodide-project/pyodide/pull/872)
 - Build runtime C libraries (e.g. libxml) via package build system with correct
   dependency resolution
+  [#927](https://github.com/iodide-project/pyodide/pull/927)
+- Pyodide can now be built in a conda virtual environment
+  [#835](https://github.com/iodide-project/pyodide/pull/835)
 
+### Other improvements
+
+- Modifiy MEMFS timestamp handling to support better caching. This in particular allows to
+  import newly created python modules without invalidating
+  [#893](https://github.com/iodide-project/pyodide/pull/893)
+
+### Packages
+- New packages: freesasa, lxml, python-sat, traits, astropy, pillow,
+  scikit-image, imageio
+
+  Note that due to the large size and the experimental state of the scipy
+  package, packages that depend on scipy (including scikit-image, scikit-learn)
+  will take longer to load, use a lot of memory and may experience failures.
+
+- Updated packages: numpy 1.15.4, pandas 1.0.5, matplotlib 3.3.3 among others.
+- New package
+  [pyodide-interrupt](https://pypi.org/project/pyodide-interrupts/), useful for
+  handling interrupts in Pyodide (see project descripion for details).
+
+
+### Backward incompatible changes
+
+- Dropped support for loading .wasm files with incorrect MIME type, following
+  [#851](https://github.com/iodide-project/pyodide/pull/851)
 
 ## Version 0.15.0
 *May 19, 2020*