added a couple more useful links

x_Links.ipynb

@@ -18,6 +18,7 @@
     "- [https://github.com/rasbt/python_reference](https://github.com/rasbt/python_reference) - Useful functions, tutorials, and other Python-related things \n",
     "- [http://stackoverflow.com/questions/tagged/python](http://stackoverflow.com/questions/tagged/python) - Search a history of thousands of questions and answers from frustrated programmers\n",
     "- [http://pythontutor.com](http://pythontutor.com) - Visually inspect what happens when running Python step by step.\n",
+    "- [http://pbpython.com/effective-matplotlib.html](http://pbpython.com/effective-matplotlib.html) - A blogpost describing an approach to using `matplotlib` to plot data. Highly recommended for newcomers, to remove some of the potential frustrations of learning to use this very powerful plotting library.\n",
     "\n",
     "### Books\n",
     "- [http://www.onlineprogrammingbooks.com/python](http://www.onlineprogrammingbooks.com/python)\n",
@@ -33,11 +34,6 @@
     "### Bioinformatics\n",
     "- [http://rosalind.info](http://rosalind.info) Rosalind is a platform for learning bioinformatics and programming through problem solving\n"
    ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": []
   }
  ],
  "metadata": {
@@ -60,5 +56,5 @@
   }
  },
  "nbformat": 4,
- "nbformat_minor": 0
+ "nbformat_minor": 1
 }