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
Added DEBUG_RUN_STEP to OCL/CUDA dump files names,

... added asserts for creating/launching kernel
Removed barriers

These barriers are not needed. They were not used by the CUDA
implementation.