Adding thousands-seperators to numbers

First of all add teh following

[dependencies] numsep = "0.1.0"

to your Cargo.toml-File.

Examples:

``` use numsep::*;

let number = 10000;

assert_eq!("10.000", separate(n, Locale::English));

```

The Locale- enum provides the following country-presets:

Locale::English, Locale::German, Locale::Canadian, Locale::Swiss, Locale::Swiss2, Locale::Singapore,

AND

Locale::Custom(Scheme)

... that can be used like that:

``` use numsep::*;

let custom = custom() .setseparator("'") .setradix(",");

let n = 2000.5;

assert_eq!("2'000,5", separate(n, Locale::Custom(custom))); ```