Converted HW1 to integrated checking
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.
fix some problems with the thrust host/device vectors in the error checking.
Merge branch 'cmake' into integratedcomparison
removed compare code files
removed compare lines from Makefiles
made reference file into header to avoid any potential multiple inclusion problems.
removed compare file from HW6's Makefile
Removed compare files from HW6's cmake file
Removed compare files from HW5's cmake file
moved test functionality out of student function, into main function