Add energy reduction for cpu
Remove static and device qualifiers
In CPU debug, remove the use of shared memory in cj as well as the CPU specific barriers.
These barriers were wrong and crashed the kernel occassionally as the loop indexes they
are called in are not the same for all threads.
Merge branch 'asc' into dk

Merge Teemu's fix on variadic macros

Conflicts:
	src/gromacs/mdlib/nbnxn_ocl/nbnxn_ocl_kernel_utils.clh
Merge branch 'asc' into dk
Merge branch 'asc' into dk
Merge branch 'asc' into dk
Merge branch 'asc' into dk-dev

Conflicts:
	src/gromacs/mdlib/nbnxn_ocl/nbnxn_ocl_kernel_nvidia.clh
	src/gromacs/mdlib/nbnxn_ocl/nbnxn_ocl_kernel_utils.clh
Remove barriers , a forgotten unroll, commented code, plist_params unused argument
Check setKernelArg error
Remove debug kernel compilation by default
Add environment option for now to turn on OpenCL compiler options:
OCL_NOOPT (cl-opt-disable), OCL_FASTMATH (cl-fast-math), OCL_DEBUG (-g on AMD or Intel)
Fix trailing spaces
remove plist_params from ocl_structures preparation as well
Merge pull request #49 from dkarkoulis/dk-dev

Dk dev