Extend chaining method names to include base and quote

[wjcrowcroft]

In money.js, you can chain methods like this:

fx(1000).from("EUR").to("USD"); // 1.2945

These could be aliased as base and quote, for consistency with the naming convention in currency pairs and exchange rate calculations

So they would also be available like this:

fx(1000).base("EUR").quote("USD"); // 1.2945

But only if it doesn't bloat the code too much.