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boolbase

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two functions: One that returns true, one that returns false

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# boolbase This very simple module provides two basic functions, one that always returns true (`trueFunc`) and one that always returns false (`falseFunc`). ### Why is this needed? By having only a single instance of these functions around, it's possible to do some nice optimizations. Eg. [`css-select`](https://github.com/fb55/css-select) uses these functions to determine whether a selector won't match any elements If that's the case, the DOM doesn't even need to be touched. ### And why is this a separate module? I'm trying to modularize `css-select` and most modules depend on these functions. IMHO, having a separate module is the easiest solution to this problem.