change tabs to 4 spaces per PEP8

[johannestaas]

There's a lot of cleaning up that can be done with the tabs used for indentation. It would make it easier for others to fork the code and add stuff. When I forked, my dev environment automatically changed some of the spacing and it made it very difficult to submit a patch that matched the indentation being used without splitting up the patch and being very careful.

I could help with this if you wanted to clean it up.

https://www.python.org/dev/peps/pep-0008/

[galkan]

I used vi for coding flashlight. But i didn't pay attention whatever tab space it used. But i will fix it as soon as possible. Thanks again for your kindly and great support.