Adding OpenACC C walkthorough
Merge pull request #5 from apc-llc/master

Adding OpenACC C walkthorough
Adding CUDA exercise 1
Adding CUDA exercise 2
Simplifying 2nd CUDA exercise
Merge pull request #6 from apc-llc/master

Add CUDA exercises
Merge remote-tracking branch 'upstream/master'
cuda-2 exercise, start state that runs on todi after module load cudatoolkit
nonworking imlementation
still nonworking