forgot a cudaFree, naughty naughty!
adding exercise 3, doing naive matrix multiplication
rename matrix multiplication example files, change the format and structure of the example, and add tiled implementations to this example rather than making a new one.
fixed some fairly unimportant output
before downloading ex3
Merge branch 'master' of https://github.com/Sandia2014/exercises
added ex3
Trying Kokkos