adding HW6 files
Merge branch 'master' of https://github.com/udacity/cs344
Converted HW1 to integrated checking
adding missing student_func.cu file
Integrated HW2 check
Converted HW3.  It doesn't run yet - debugging now.
Changed some default filenames for output files so that they are distinct between homeworks.
Changed some default filenames for output files so that they are distinct between homeworks.
Small fixes in memory management to HW3.  Fix missing prefix in difference filenames for HW 1, 2, 3
Removed references to HW3's compare code from CMake and makefile
Starting to integrate HW4.
fixed problem observed on Linux where function to generate reference images needed to be done outside of the .cu file.
Working on HW4 test integration.  Crashing at saving reference file.
Fixes in error checking for projects 3 and 4.
Merge pull request #8 from msarahan/cmake

Added CMake
fix some problems with the thrust host/device vectors in the error checking.
fixed print statement from single quotes to double quotes.
Added HW6 to CMake set.
Merge branch 'cmake' into integratedcomparison
removed compare code files