Semi colon seperators

[lukeapage]

see #35

Had to also fix some issues with arguments - look at first commit only

Does not support

.mixin(@a: a, b;) {
    test: @a;
}

I wonder if a "strict mode" that doesn't support deprecated features would be better to support ";" - then I could do mixin definitions cleanly. Either that or a less 1.4 branch?

[matthew-dean]

I thought of a strict mode, but in order to have different "modes", I think we would first need to finalize the configuration syntax, and implement that feature. See Issue #850.

As a thought, forcing all operations to only happen in parentheses (when we roll that out) could also be part of strict mode, until we make "strict" the normal operation down the road.

For now, this works great because it doesn't break any existing code. Nice work!

[lukeapage]

pulled