Replace all tabs with spaces

[danez]

I was not sure if it was by intention, but inside the files there were a mix of tabs and spaces. I converted all of them to spaces.

\t => \s\s

[edvinerikson]

This looks great to me. Is there anything blocking this @mzabriskie?

[BBB]

@danez It might be worth adding a .editorconfig file alongside this PR. http://editorconfig.org/

Something like this:

root = true

[*]
indent_style = space
indent_size = 2
trim_trailing_whitespace = true
end_of_line = lf
insert_final_newline = true

[timdorr]

I agree. Probably don't want to turn this into a religious war, but having consistent things like indentation and line endings is important.