Indentation strict and not strict mode.

This is so we can ignore issues with coffeelint not correctly
understanding indentation, but still have a tiny little indentation
check for consistency, just that it's a multiple of what we set the
indentation value to.

This is how we fixed #64 #4 and #46 for ourselves.

I'm optimistic because we added it as an option, it might not be to problematic to pull into the core?