update README

README.rst

@@ -37,14 +37,20 @@ Installation
 
 If you want to run simulations on the machine where you're installing,
 you will need to call `build` before installing.
+Before executing any command, please modify `machine_settings_py.py`
+appropriately for your machine (otherwise the `build` command will most
+likely fail).
+This file will be copied the first time you run `setup.py` into
+`$HOME/.config/bfps/machine_settings.py`, where it will be imported from
+afterwards.
+You may, obviously, edit it afterwards and rerun the build command as
+needed.
 
 .. code:: bash
 
     python setup.py build
     python setup.py install
 
-The `build` command will most likely fail unless you modify
-`machine_settings.py` appropriately for your machine.
 Also, in order to run the C++ code you need to have an MPI compiler
 installed, the HDF5 C library as well as FFTW 3 (at least 3.3 I think).
 

done.txt

@@ -11,3 +11,4 @@ x 2016-01-07 FFTW interpolator doesn't need its own field
 x 2016-01-08 simplify tracer/field addition mechanism                                @design +v1.0 +particle_api
 x 2016-01-08 add stat choice parameter to add_particles                              @design +v1.0 +particle_api
 x 2016-01-15 particle output is broken when niter_part != 1                          @bugfix
+x 2016-01-19 clean up machine_settings mess                                          @design @documentation +v2.0

todo.txt

@@ -4,7 +4,6 @@
 (B) set up mechanism for adding in new PDEs                                 @design +v2.0 +alternate_algorithms
 (B) tweak HDF5 settings                                                     @optimization @HDF5 +I/O
 (B) use less memory                                                         @optimization
-(C) clean up machine_settings mess                                          @design @documentation +v2.0
 (C) code overview                                                           @documentation
 (C) move stat I/O to cpp lib                                                @design @HDF5
 (C) test involving hydrodynamic similarity                                  @tests