Installing Flask on Windows

Here is a quick instruction:

1. Install python: https://www.python.org/downloads/
2. Go to the scripts folder of the python folder
3. Run pip.exe install virtualenv
4. Run virtualenv.exe test_project
5. Go to the script folder of the new folder: cd test_project/Scripts
6. Run pip.exe install Flask
7. Create a hello-world app
8. Run it from the current directory: python.exe hello.py