+ Update Physics analysis for Compton Telescope

* Fixing issue with Materal Manager: Mylar and Kapon were improperly
* define

+ Update MUGAST geometry so rectangular detectors are now taken
  into account

+ Change permissions for MUGAST analysis files
+ Update ControlSimu.C macro

 - optional token, keeping retrocompatibility
 - allow to use "beam" at rest as source for gamma cascade

+ Update trapezoid geometry for gaspard

+ Change file permission for e644.detector

+ remove Analysis executable from tutorial cats directory

  detector

+ ongoing work for adapting GaspardTrackerAnnular to the new
  scorer scheme

 - 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

* editing the NPSimulation UI for nicer interface
 - adding menue and icon for common command
 - adding free icons for nice interface

* Adding creation of small sample cube by the material manager to ensure
* every declared material are used, so no crash when writting the DEDX
* tables

 - all material were always define but not use, causing crash in DEDX
   table output
- code clean up for Plastic.cc

* adding Dictionnary for VDetector class to avoid error message in root

* outputted incorrectly

* committed prototype