remove debug flag from cuda makefile.
fixes to bonded interactions on device.
remove engine_flag_sets.
fixing bugs in bonded interaction on GPU.
first tentative commit for bonded interactions on the GPU.
forgot to add this to last commit.
added SIMT-type dopair/doself loops.
forgot to add this in last commit.
Fixed some issues in angle.c and dihedral.c without vectorization
Replaced tabs