Fix errors while applying to Erasmus3 project
Add constructor device_array_t(array_t), explicit conversion from host array
Rename device_array.h -> cuda.h
Add function fromfile(filename)
Add function to_cv_gpu_mat(device_array_t)
Fix compile error
Add more functions while applying new numcpp to Erasmus3 project
Remove backup source files
Rename numcpp.h -> numcpp/numcpp.h
Update numcpp.cpp to include all numcpp headers and test compile
Rename test_main.cpp -> test.cpp