Add more Google Colab badges

Author: gjbex

README.md

@@ -25,20 +25,17 @@ Subjects and Python modules that will be covered:
 
 Jupyter notebooks:
 
-  1. `system_information.ipynb`:
+  1. [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/system_information.ipynb) [`system_information.ipynb`](system_information.ipynb):
      illustrates how to use several standard library modules to
      retrieve information from the operating system
-     [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/system_information.ipynb)
-  1. `filesystem_interaction.ipynb`
-     [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/filesystem_interaction.ipynb): 
+  1.  [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/filesystem_interaction.ipynb) [`filesystem_interaction.ipynb`](filesystem_interaction.ipynb): 
      illustrates how to work with the file system.
-  1. `shell_interaction.ipynb`
-     [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/shell_interaction.ipynb): 
+  1.  [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/shell_interaction.ipynb) [`shell_interaction.ipynb`](shell_interaction.ipynb): 
      illustrates the use of the `sh` and
      `subprocess` modules to interact with the shell.
-  1. [`julia.ipynb`](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/julia.ipynb):
+  1.  [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/julia.ipynb) [`julia.ipynb`](julia.ipynb): 
      illustrates monitoring a running process.
-  1. [`compressed_files.ipynb`](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/compressed_files.ipynb):
+  1.  [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/gjbex/PythonSysProg/blob/master/compressed_files.ipynb) [`compressed_files.ipynb`](compressed_files.ipynb): 
      illustrating how to work with compressed files and archives.
 
 The notebook on SSH is not included, since that can not be used