Code refactoring: Moved detector control to separate file
Code refactoring, modernization and improvements

 * No using namespace std anymore
 * Added time measurement between frames to
   have a global measurement time for each
   frame.
Added ROOT file support

Native ROOT file support implemented, though so far
without the use of TTree.

I used the occasion to improve CMakeLists.txt, included
script for automatic configuration for LibUSB. Still
a script for libdrs is required.