[Coding Style] Replace tabs with spaces

[RobLoach]

In regards to #2 and other coding style enhancements, replace tabs with two spaces:
https://github.com/polarmobile/coffeescript-style-guide#tabs-or-spaces

[RobLoach]

@balupton Ping?

[balupton]

Thanks Rob, We actually have our own coding standards here: http://bevry.me/learn/bevry-coding-standards which prefer tabs over spaces. I've done a pretty bad job of publicising our coding standards in the past, but wanting to step that up a lot more now. Hence why you can now find them on the bevry website :)

[RobLoach]

👍