Reorganize files, Part 1 (#119)

* delete obselete files

* move files

* build

* update cmake

* update cmake

* fix build

* reorg examples

* update cmake for example and test

include/ck/utility/sequence_helper.hpp

@@ -0,0 +1,36 @@
+#ifndef CK_SEQUENCE_HELPER_HPP
+#define CK_SEQUENCE_HELPER_HPP
+
+#include "tuple.hpp"
+
+namespace ck {
+
+template <index_t... Is>
+__host__ __device__ constexpr auto make_sequence(Number<Is>...)
+{
+    return Sequence<Is...>{};
+}
+
+// F returns index_t
+template <typename F, index_t N>
+__host__ __device__ constexpr auto generate_sequence(F, Number<N>)
+{
+    return typename sequence_gen<N, F>::type{};
+}
+
+// F returns Number<>
+template <typename F, index_t N>
+__host__ __device__ constexpr auto generate_sequence_v2(F&& f, Number<N>)
+{
+    return unpack([&f](auto&&... xs) { return make_sequence(f(xs)...); },
+                  typename arithmetic_sequence_gen<0, N, 1>::type{});
+}
+
+template <index_t... Is>
+__host__ __device__ constexpr auto to_sequence(Tuple<Number<Is>...>)
+{
+    return Sequence<Is...>{};
+}
+
+} // namespace ck
+#endif