add ifndef expression for CLING
add marked down quick start guide to README.md
add blank lines before and after code blocks
replace \(\"...\"\) with '("...")' in ROOT command line examples
add script that prepends GPLv3 header to all source code files
delete duplicate license file and prepend GPLv3 header to all source code files
Merge branch 'master' of github.com:delphes/delphes
fix ReadSTDHEP4 in classes/DelphesSTDHEPReader.cc
First example displaying the geometry in 3D

The geometry.C example script reads the acceptance from the Delphes
configuration and generates from there a 3D representation of the
detector in ROOT (using the geometry package).

This initial version makes few assumptions: the detector must be
symmetric and have a single calorimeter. The module names are fixed.
Therefore, the script works with CMS and ATLAS geometries but not with
the prototype FCC geometry.
Made the configuration more flexible

The names of modules used in the tcl files are now optionnally set when
loading the cfg. It allows to read the FCC file despites it being quite
different.
Still, for now only one calorimeter can be displayed.
Display the eta acceptance of the tracking volume
Generalized for >1 calorimeters

Now works as expected with the FCC geometry.
Bug fix in the calo towers for endcaps

Two little things: the number of phi bins was hardcoded and too many eta
bins were considered.
Use EVE to display the geometry

This is a first demonstration of how to integrate the geometry into an
EVE event display.
integration of event display ongoing

Not functionnal so far. geometry.C still only displays the geometry in a
eve window.
Almost integrated geometry and event display

In terms of functionalities, we should be close. But this has to be
debugged. Then, other features will have to be developed.
Mostly in place but crashing

Just debugged the obvious typos and other things. It compiles.
Still, crash at runtime in TGeoManager::SetTopVolume(TGeoVolume*)
First working version

Many features are still missing, but that version provides the minimal
features in EventDisplay and in addition: event control and transluscent
geometry.
Small cleaning
Added MET to the display

First version. The MET vector appears properly on the 3D view but not on
the projections... Why?