[getting_started] fix spacing so RST doesn't insert blockquote (#69)

* fix spacing so RST doesn't insert blockquote

* adjust to use syntax highlighted code-blocks

* add no-execute

Author: mmcky

source/rst/getting_started.rst

@@ -429,25 +429,37 @@ One library we'll be using is `QuantEcon.py <http://quantecon.org/quantecon-py>`
 You can install `QuantEcon.py <http://quantecon.org/quantecon-py>`__ by
 starting Jupyter and typing
 
-    ``!conda install quantecon``
+.. code-block:: ipython3
+    :class: no-execute
+  
+    !conda install quantecon
 
 into a cell.
 
 Alternatively, you can type the following into a terminal
 
-    ``conda install quantecon``
+.. code-block:: bash
+    :class: no-execute
+
+    conda install quantecon
 
 More instructions can be found on the `library page <http://quantecon.org/quantecon-py>`__.
 
 To upgrade to the latest version, which you should do regularly, use
 
-    ``conda upgrade quantecon``
+.. code-block:: bash
+    :class: no-execute
+
+    conda upgrade quantecon
 
 Another library we will be using is `interpolation.py <https://github.com/EconForge/interpolation.py>`__.
 
 This can be installed by typing in Jupyter
 
-    ``!conda install -c conda-forge interpolation``
+.. code-block:: ipython3
+    :class: no-execute
+
+    !conda install -c conda-forge interpolation