Updated README with links to PRs and issues

NOTE: The files are in synch with
boutproject/BOUT-dev@50e3b46

README.md

@@ -7,24 +7,33 @@
 [![PEP8](https://img.shields.io/badge/code%20style-PEP8-brightgreen.svg)](https://www.python.org/dev/peps/pep-0008/)
 [![License](https://img.shields.io/badge/license-LGPL--3.0-blue.svg)](https://github.com/boutproject/boututils/blob/master/LICENSE)
 
-pip-package of what was previously found in 
+pip-package of what was previously found in
 `BOUT-dev/tools/pylib/boututils`
+Note that `BOUT-dev/tools/pylib/boututils` will likely be replaced by this repo
+in `BOUT++ v4.3.0`.
+See [this issue](https://github.com/boutproject/BOUT-dev/issues/1347),
+[this pull request](https://github.com/boutproject/BOUT-dev/pull/1766) and
+[this pull request](https://github.com/boutproject/BOUT-dev/pull/1740) for details.
+
+> **NOTE**: This package will likely be superseded by
+  [`xBOUT`](https://github.com/boutproject/xBOUT) in the near future
 
 # Dependencies
 
-`boututils` depends on 
-[`netcfd4`](https://github.com/Unidata/netcdf4-python) which requires 
-[`HDF5`](http://www.h5py.org) and 
-[`netcdf-4`](https://github.com/Unidata/netcdf-c/releases) are 
-installed, and that the `nc-config` utility is in your `PATH`. This 
-can be install with 
+`boututils` depends on
+[`netcfd4`](https://github.com/Unidata/netcdf4-python) which requires
+[`HDF5`](http://www.h5py.org) and
+[`netcdf-4`](https://github.com/Unidata/netcdf-c/releases) are
+installed, and that the `nc-config` utility is in your `PATH`. This
+can be install with
 
 ```
 sudo apt-get install libhdf5-serial-dev netcdf-bin libnetcdf-dev
 ```
- 
+
 in ubuntu
 
 # Install
 
-`pip install boututils`
+`pip install boututils`
+