Add matplotlib tutorial

1_numpy_matplotlib_scipy_sympy/2-matplotlib_tutorial.ipynb

@@ -439,6 +439,7 @@
    "source": [
     "## 3. References\n",
     "\n",
+    "* [matplotlib的基础用法汇总](https://m.toutiaocdn.com/i6874582238512546315)\n",
     "* [matplotlib 详细教程](matplotlib_full.ipynb)\n",
     "* [matplotlib 教程](https://www.runoob.com/w3cnote/matplotlib-tutorial.html)\n",
     "* [Pyplot tutorial](https://matplotlib.org/users/pyplot_tutorial.html)\n",