2010/03/09	
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New parameter: Extract
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Extract information from cascades to several files. It is necessary generate a full cascade 
(LevelOfSimulation 0) to obtain interstitials and vacancies.

You must put a value after the token Extract. This value is the sum of the following terms:

Add  1 if you want a file named "Interstitials.txt".
Add  2 if you want a file named "Vacancies.txt"
Add  4 if you want a file named "Projectiles.txt"
Add  8 if you want a file named "Projectiles_InitPos.txt"
Add 16 if you want a file named "Backscattered.txt"

In example:

	Extract 17 

It will output the files "Interstitials.txt" and "Backscattered.txt"

File "Interstitials.txt"
========================
 It contains the interstitials generated at	each cascade. The information contained is the 
following columns:

#             X              Y               Z                W          Energy Atom_index

The character '#' is interpreted as a remark in gnuplot (plotting software)
It contains the final position (X,Y,Z) of the interstitial. X is the depth. 
They are measured in nanometers. The value W is the statistical weight. Energy is the final energy
of the secondary recoli (interstitial). Atom_index is a number that represents the atom. The 
first atom you define in your input file will be Atom_index = 1 and so on.

File "Vacancies.txt"
====================
 It contains the vacancies generated at each cascade.
 Columns:
 
#             X              Y               Z                W  Atom_index 

They are the initial positions of secondary recoils. There is no diffusion simulated nor intra- 
neither inter-cascade.

File "Projectiles.txt"
======================
 It contains the final position of ions.
 Columns:

#             X              Y               Z                W          Energy Atom_index
 
File "Projectiles_InitPos.txt"
==============================
 It contains the initial position of ions (the entry point). 
 Columns:
 
#             X              Y               Z                W          Energy Atom_index 
 
File "Backscattered.txt"
========================
 It contains the final position of back-scattered ions or sputtered atoms.
 Columns:

#             X              Y               Z                W           DirX           DirY            DirZ           Energy Atom_index 

It includes the direction of the ions or atoms (DirX, DirY, DirZ).