added multiple kernel arg convenience function
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/OpenCL_utils.c
Extend Makefile clean to include object files
Merge branch 'master' of git://github.com/vossjo/ljmd-opencl into vossjo-master
Merge remote-tracking branch 'upstream/master'

Placed comments and moved 2 lines for the sake of clarity

Conflicts:
	src/ljmd-cl.c