Display secondary locations and flow steps

fixtures/compile_commands.json

@@ -1,7 +1,7 @@
 [
 {
   "directory": ".",
-  "command": "/usr/bin/c++ sample.cpp",
+  "command": "c++ sample.cpp",
   "file": "sample.cpp",
   "output": "dummy"
 }

fixtures/secondaries.txt

@@ -0,0 +1,9 @@
+
+int divide_seventeen(int param) {
+  if (param == 0) {
+    int a = 0;
+  } else {
+    int b = 0;
+  }
+  return 10 / param;
+}