histogram

Adding modification to Actar as well

Updating Scone, ChiNu and PISTA detectors

        - Less read out code
        - Better memory management
        - Faster simulation

        - also made some change to get a more functionnal detector

        - Detector branch was not attached

        - Modification of all existing detector class
        - Modification of Detector Skeleton
        - Branch is now called only if Branch does not exist
        - Cosmetic change to display when reloading geometry

* Restaure NPTool style (previous one was broken)

  - All detector are now in the Detectors folder

- Adding travis build of G4
- Adding travis run of test
- fixing potential conflict when compiling and running nps on linux

 detector
* Few update during S1554 run

* Progress on run anywhere npsimulation
* Progress on API for NPS

 - Delete the actual geometry
 - Clear the Detector Manager
 - Reload Geometry file

For this to work a couple of thing has been done:
 - InitializeRootInput now need an extra SetBranchAddress to tell the
   tree that the previous address is no longer in use
 - Scorer can not be cleared, so need to be retrieved in case of a
   reloading. If they do not exist they are created
 - This is done using the new CheckScorer static method from VDetector