Add another FAQ about 6.00.1x to its coursepage

Add the answer to a frequently asked question about 6.00.1x course: "Can I use VS Code/my favorite text editor?" to its coursepage.

coursepages/intro-cs/README.md

@@ -28,5 +28,6 @@ Alternative Links:
 
 - You don't need to install the full anaconda package to do this course. You can just download the Spyder IDE from here: <https://github.com/spyder-ide/spyder/releases/latest>. It comes bundles with python as well as some popular scientific python libraries (all the libraries which this course uses are included), but it is not as large or complex as the full anaconda distribution. You don't need to set up python separately or anything.
 - The community has found this resource useful: <https://www.youtube.com/playlist?list=PL4e66Kzl1JCFPVBa7gBzWJF_FDF3KBf-2>
+- You can use VS Code, or any text editor/IDE you prefer. If you are using a text editor/IDE other than Spyder/Anaconda, you should note that the course sometimes ask you to run some additional statements after running a python file. To do so, run `python -i file.py`. Then you can run additional statements. 
 - You won't get any certificate for doing this course. If you really want a certificate, you need to do the [instructor-paced version of this course](https://www.edx.org/course/introduction-to-computer-science-and-programming-7) on Edx. Certificate of an introductory course like this is not very valuable, so unless you are absolutely sure, we recommend you to do the archived version of this course instead.
 - If for some reason you want to do the OCW version of the course, you will find many useful notes and fixes of various problems in our [discord server](https://discord.gg/jvchSm9).