* Added the capability of directly compiling cuda and ptx to CMake.

* Added comment to show example use case for cuda source file.

* Minimum compute/sm is 35 in order to support PTX intrinsics

* Updated CMake and added example nvcc kernel.

* Made cudart link statically.

* Added compute/sm capabilities for code gen in nvcc based on either cuda 8 or 9.

* Header update.

* Fix cmake indentation.