add node modules to repo

node_modules/utf8-byte-length/README.md

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+# utf8-byte-length [![build status](https://secure.travis-ci.org/parshap/utf8-byte-length.svg?branch=master)](http://travis-ci.org/parshap/utf8-byte-length)
+
+Get the utf8 byte length of a string, taking into account multi-byte
+characters and surrogate pairs.
+
+By default, this module defers to `Buffer.byteLength`. A browser
+implementation is also provided that doesn't use `Buffer.byteLength`
+minimize build size.
+
+## Example
+
+```js
+var getLength = require("utf8-byte-length")
+console.log(truncate("a☃", 2)) // a = 1 byte, ☃ = 3 bytes
+// -> 4
+```
+
+## API
+
+### `var getLength = require("utf8-byte-length")`
+
+*When using browserify or webpack*, this automatically resolves to an
+implementation that does not use `Buffer.byteLength`.
+
+### `getLength(string)`
+
+Returns the byte length of `string`. Throws an error if `string` is not
+a string.