tAdded details concerning helper_math.h file from the sdk - sphere - GPU-based 3D discrete element method algorithm with optional fluid coupling
 (HTM) git clone git://src.adamsgaard.dk/sphere
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       ---
 (DIR) commit 63cf7ba3c83aac1a3f2b7836262fbc7b9052b84f
 (DIR) parent 0ddcc847fc900cbb8998edcfc38cc3273e15782d
 (HTM) Author: Anders Damsgaard <adc@geo.au.dk>
       Date:   Thu, 14 Mar 2013 22:48:34 +0100
       
       Added details concerning helper_math.h file from the sdk
       
       Diffstat:
         M README.rst                          |       5 ++++-
       
       1 file changed, 4 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/README.rst b/README.rst
       t@@ -59,7 +59,10 @@ found.
        
        In that case, modify the ``CUDA_SDK_ROOT_DIR`` variable in `src/CMakeLists.txt`
        to the path where you installed the CUDA samples, and run ``cmake . && make``
       -again.
       +again. Alternatively, copy `helper_math.h` from the CUDA sample subdirectory 
       +`common/inc/helper_math.h` into the sphere `src/` directory, and run `cmake` 
       +and `make` again. Due to license restrictions, sphere cannot be distributed
       +with this file.
        
        After a successfull installation, the `sphere` executable will be located
        in the root folder. To make sure that all components are working correctly,