Removed some dependencies that were failing to build

I don't understand what was the purpose of these libs:

-   `pathwatcher` wasn't even used anywhere and was causing installation errors described in #2.
    I replaced the `pathwatcher.write` call with node.js `fs.writeFileSync`.
-   `fuzzaldrin`: Filtering suggestions is not needed because Racer is responsible for this.
Hmm, re-read what you've written. You are saying racer itself already filters things without this line? The thing is, the way it works now, it will actually continue to filter if you continue typing once the results from racer have already returned. So I type for example: `hashmap::S` I'll get a completion list with a bunch of stuff in it. Then, if I continue typing `hashmap::Set` it will narrow the list down as I type to `SetItems` and `SetMoveItems`. which is nice and really useful so you don't have to move your hands from the homerow to the arrow keys.