Convert all indentation to spaces and all line endings to Windows

Seems like a large change, but in fact it is simple and automatic:

1. Conversion of line endings to Windows format (\r\n). Sometimes it is necessary to look at configuration/code on a production machine, where you don't have decent text editors. Unix line endings make text in Notepad look like a mess. It is unlikely that you use these scripts in Unix environments, thus it is more convenient to have Windows line endings everywhere.

2. Conversion of indentation to spaces. In my previous pull request I noticed that some indentation looks ugly in GitHub diff. This was because of mixed tabs and spaces, which I didn't notice earlier. I took liberty to convert all indentation to 4 spaces per level.

I made conversions automatically in Sublime Text editor, so I hope that I didn't introduce any bugs.