Installation instructions for exercises:

* Put the corresponding directory under the main Siesta exercises directory ,
which should also contain a "bin" directory to hold the various
executables. Below we refer to the main Siesta exercises directory as
${SIESTA_EXERCISES}.

* In the main $HOME/.bashrc, put a line which directs it to process
${SIESTA_EXERCISES}/.Config/tutorial.bashrc. This file contains the relevant
definitions, among other useful things. Definitions and aliases for
other modules of the tutorial could be added there at will.

So, in a nutshell:

* Choose a location for the Siesta package.
* Have a 'bin' directory where all the executables can be stored.
* Put a line in the main .bashrc file to pick up the definitions and
aliases. In particular, the PATH should be augmented  by a reference 
to the 'bin' directory mentioned above.
* Each module can live in its own subdirectory.
* At CECAM we distributed the exercises by "Days". A more flexible
set-up could be achieved through symbolic links, but those do not
travel well.
