add parse checker sample

samples/parse_check.c

@@ -0,0 +1,22 @@
+#include "md.h"
+#include "md.c"
+
+int main(int argument_count, char **arguments)
+{
+    MD_Node *list = MD_MakeList();
+    for(int i = 1; i < argument_count; i += 1)
+    {
+        MD_Node *root = MD_ParseWholeFile(MD_S8CString(arguments[i])).node;
+        MD_PushReference(list, root);
+    }
+    
+    for(MD_EachNodeRef(root, list->first_child))
+    {
+        for(MD_EachNode(node, root->first_child))
+        {
+            MD_OutputTree(stdout, node, 0);
+        }
+    }
+    
+    return 0;
+}