+ [X] Code cleaning (delete unused sources)
+ [X] CUDA streams vs OpenACC queues logic
+ [X] Test suite for memset
+ [ ] Test suite for auxfunc
+ [ ] Test suite for memcpy + slicing
+ [ ] Add non-optional arguments for host fallback (logical) and async object to memcpy and linalg
+ [ ] AMD linear algebra missing routines (issue #15)
+ [ ] Documentation (FORD + readme improving)
+ [ ] FFT 3D interfaces
+ [ ] Source code generation refactoring: pure Python

====
FIXES
====
+ [ ] the logic of lbound in memcpy needs to be fixed 
