[EventGeneratorIsotropic] add the Flat source profile option in EventGeneratorIsotropic. By default, Gauss is chosen

histogram

  - ROOT branches with real energy/time added to NPLib
  - N.B. electron source added to EventGeneratorIsotropic

! Adding a new folder TrackReconstruction for Tracking algorithm

        - Now use separate folder for scorer, event generator and
          physics

* old one
* Run replace.sh to replace old matta@ipno.in2p3.fr address

* updating copyright
* updating a matta email

* particle for the same event. Example of token is in
* Inputs/EventGenerator/np.source No need to modify token of
* proton.source or deutron.source... It reads m_particleName as a
* vector<string> now and loop over the size of m_particleName

* multiplicities for an event. A new token 'Multiplicity=' has been
* created that is given to m_Multiplicity. In the function GenerateEvent
* a loop on m_Multiplicity is done for a given event. The
* check_Multiplicty is not require in order to not break any use of
* NPTool. The default value of m_Multiplicty being 1.

! angular ditribution from an TH1F histogram to simulate p, d, t...

        - OpticalPhoton are now correctly generated and tracked

source

- The Beam info were filled but cleared too soon
- A flag telling whenever the info need to be cleared has been added

 - The target was not created and thus the Material not register in the dE/dx table. So NPS crash when trying to write the table. The table is no longer written if the size of the target is 0

* Fixing issue when EventGeneratorIsotropic is used for gamma emission

 - NPS was giving conflict between NP system of Unit and CLHEP one, this is was fixed by a nested ifdef on HEP_SYSTEM_OF_UNIT

* Fixing issue with S1:
 - in Detector Manager a tipo was desabling the condition compilation of S1

* Fixing issue in Isotropic:
 - conflict when the particle was light nuclei given by its name (eg proton instead of 1H)
 - Problem is fixed and user can use gamma, proton, deuton, triton and alpha spelling

 - Put 2009-2013 copyright date
 - Change the place of the ifndef position to avoid multiple inclusion of comment line

 - Can emmit gamma or nuclei
 - use the particle stack