exa2pro/starpu-max: porting work to Maxeler DFE @ c68f8d40de7b67641add3e514b7c3b3febb12e8e

Samuel Thibault 50996d4071 Fix termination hang: make sure all tasks are finished before shutting down		14 lat temu
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cg.c	50996d4071 Fix termination hang: make sure all tasks are finished before shutting down	14 lat temu
cg.h	68c2135caf fix yet more c++-like comments	15 lat temu
cg_dot_kernel.cu	48aea5e024 Bug fix: use a kernel to actually put zeros in the vector that is initialized	15 lat temu
cg_kernels.c	7517525097 examples/cg/cg_kernels.c: include limits.h which defines INT_MAX	15 lat temu