Add benchmarks, change project structure

bench/tests/BenchVec3f.c

@@ -0,0 +1,33 @@
+#include <BH/Bench.h>
+#include <BH/Math/Vec3f.h>
+#include <stdlib.h>
+
+
+BH_BENCH_TEST(Vec3f)
+{
+    float a[3], b[3];
+
+    a[0] = (rand() % 100) / 200.0;
+    a[1] = (rand() % 100) / 200.0;
+    a[2] = (rand() % 100) / 200.0;
+
+    b[0] = (rand() % 100) / 200.0;
+    b[1] = (rand() % 100) / 200.0;
+    b[2] = (rand() % 100) / 200.0;
+
+    while (BH_BenchIter(state))
+    {
+        BH_Vec3fAdd(a, b, a);
+    }
+}
+
+
+int main(int argc, char **argv)
+{
+    BH_UNUSED(argc);
+    BH_UNUSED(argv);
+
+    BH_BENCH_ADD(Vec3f);
+
+    return BH_BenchRun();
+}