add example code for tutorial fot 2013 NM Supercomputing Challenge
remove -std=c++03 flag and rename pause() to my_pause(), tested on Mac OS X
minor changes based on comments from practice talk
use constant_iterator for dx, use predefined multiply functor for y*dx
fix a typo in comment for print_float
add symbolic link for .cu files, add CMake targets for CUDA backends from Christine
minor changes