Changes to get the app running on Windows

[namdhng]

• Include instructions on how to update PATH environment variables in Control Panel.
• Pay particular attention to the version of Python and use the correct corresponding command.
• Change "export" to "set" in bootstrap.sh file.
• When testing HTTP methods by using curl commands, the content that we want to add, update, or delete (the part in single quotes after --data or -d) has to be put in a separate text file in the same directory rather than entered directly in the command line. The file can then be called in the command line using "@name.txt". For example, if the file containing the content is named "data.txt", then we can simply call it with "@data.txt".
• For the income endpoint, the single quotes after "--header" need to be changed to double quotes.

[jbasney]

Thanks @namdhng for the details.