Agreed upon binary file formats for passing data between various codes. 
The formats are given by:
   A.vX
where A is the type of file and X is the integer version number.

All units should be SI.
   distances are in meters [m]
   times are in seconds [s]
   masses are in kilograms [kg]
     etc...

The first entry in each file is a char[64] that identifies the file format.
The second entry is an integer version number.
The third entry is a char[1024] that is a comment.  The comment is by 
    definition completely irrelevant to all programs.  They are only there to 
    help humans understand what other humans were doing.

Currently, we have:

Filename         | Contents                                      | Units
-----------------+-----------------------------------------------+-------------
Q.v1             | List of Q-Vectors, for BvK, Simulations, etc. | 1/m
FractionalQs.v1  | List of Q-Vectors in fractional coordinates.  | --
E.v1             | List of Energies, for BvK, Simulations, etc.  | J
Omega2.v1        | List of squared angular frequncies.           | Hz^2
Polarizations.v1 | List of Polarization vectors, from BvK, etc.  | --
                 |     Eigenvectors of the Dynamical matrix are  |
                 |     made up of D polarization vectors in a    |
                 |     column. The eigenvector should be         | 
                 |     normalized to 1.0.                        |
Sqe.v1           | List of Scattering as a function of Q and E.  | m/J
Sq.v1            | List of Scattering as a function of Q         | m  
                 |                                               |