From Alja, Bertrand and Matevz - merged branches/dev/fireworks 22550:23082.

Major changes imported by this merge are:

gl/
====
- reorganization of scene rendering in TGLViewer - render opaque
  objects from all scenes first, then all transparent ones;

- improve saving of images from the GL-viewer so that the dialog boxes
  and other windows do not result in black areas on the saved image;

- improved management of FTGL fonts accross GL contexts.

eve/
====
- new classes for visualization of calorimeter data in lego mode;

- allow fixed scale beyond given radius for fish-eye projections.


git-svn-id: http://root.cern.ch/svn/root/trunk@23087 27541ba8-7e3a-0410-8455-c3a389f83636