Call `anymatch` only once per sort.

```coffeescript
# anymatch will be called 5k times
[5k files array].sort (a, b) -> anysort a, b, criteria

# will be called 1 time, looks cooler
[5k files array].sort anysort criteria

```
Merge pull request #1 from paulmillr/patch-1

Call `anymatch` only once per sort.