Setup: call winpty to access Python via Git Bash

Also, improve language in setup.md

Closes #457

Signed-off-by: Maxim Belkin <[email protected]>

Author: petebachant

setup.md

@@ -25,7 +25,7 @@ you should have already
 [installed Anaconda](http://swcarpentry.github.io/workshop-template/#python)
 which includes the notebook.
 
-To start the notebook server, open a terminal or git bash and type the command:
+To start the notebook server, open a terminal or git bash and execute the command:
 
 ~~~
 $ jupyter notebook
@@ -36,12 +36,20 @@ Then create a new notebook using the drop-down menu on the right to select 'Pyth
 
 ![](../fig/new-notebook.png)
 
-To start the Python interpreter without the notebook, open a terminal or git bash and type the command:
+To start the Python interpreter without the notebook, open a terminal
+or command prompt and execute the command:
 
 ~~~
 $ python
 ~~~
 {: .source}
 
+Note: If using Git Bash on Windows, you have to call Python via `winpty`:
+
+~~~
+$ winpty python
+~~~
+{: .source}
+
 [zipfile1]: {{ page.root }}/data/python-novice-inflammation-data.zip
 [zipfile2]: {{ page.root }}/code/python-novice-inflammation-code.zip