Added pictures.

9ed50f6f · Frederic Bastien · 1865c2b9 · 9ed50f6f · 9ed50f6f · 9ed50f6f
--- a/doc/hpcs2011_tutorial/pics/CPU_VS_GPU.png
+++ b/doc/hpcs2011_tutorial/pics/CPU_VS_GPU.png
--- a/doc/hpcs2011_tutorial/pics/Caffeine_Machine_no_background_red.png
+++ b/doc/hpcs2011_tutorial/pics/Caffeine_Machine_no_background_red.png
--- a/doc/hpcs2011_tutorial/pics/bloc_repartition.png
+++ b/doc/hpcs2011_tutorial/pics/bloc_repartition.png
--- a/doc/hpcs2011_tutorial/pics/grid_block_thread.png
+++ b/doc/hpcs2011_tutorial/pics/grid_block_thread.png