* introductiong VSpectra a template virtual class from which derived the
* TSpectra classes

* Fixing minor bug in NPBeam and NPReaction

* Detector are now put in alphabetical order

* Updating copyright
* adding AnnularS1Physics class

* Sharc scorer are now named SIlicon Scorer
* GeneralScorer moved to ObsoleteGeneralScorer
* The Obsolete Scorer are kept until all detector are move to the new
* syle of scorer

 - The header of the tree was written multiple time in certain case
 - The tree was appering twice, even everything was perfectly
   functionnal

  - Wafer and PCB cutout
  - Active and Wafer geometry is accurate
  - PCB information need to be confirmed but are realistic

  - A simple target rootlogon has been added to the makefile
  - The target call a script that add the need line to .rootlogon
  - if the file does not exist it is created

 - Former installation method still working
 - user just have to source nptool.sh to setup the environment variable

* Adding README.md file for GithHub page

* The code compile and run but still need confirmation that it work as
* expected
* Modification does not affect the usual single differential way of
* working