Move Project Euler under puzzles.

puzzles/project_euler/tmpl.py

@@ -0,0 +1,17 @@
+/* Check cf5-opt.vim defs.
+VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
+VIM: let g:wcppflags="/O2 /EHsc /DWIN32"
+*/
+#include <iostream>
+
+/*
+
+Solution:
+*/
+
+int main ( void )
+{
+
+	return 0;
+}
+