Merge pull request #117 from gabrielelana/byte-units

Add ByteUnits library in 'Text and Numbers' section

README.md

 * [PHP Conversion](https://github.com/Crisu83/php-conversion) - Another library for converting between units of measure.
 * [SQL Formatter](https://github.com/jdorn/sql-formatter/) - A library for formatting SQL statements.
 * [Byte](https://github.com/jschaedl/Byte) - A simple byte conversion library.
+* [ByteUnits](https://github.com/gabrielelana/byte-units) - A library to parse, format and convert byte units in binary and metric system.
 * [UA Parser](https://github.com/tobie/ua-parser/tree/master/php) - A library for parsing user agent strings.
 * [LibPhoneNumber for PHP](https://github.com/giggsey/libphonenumber-for-php) - A PHP implementation of Google's phone number handling library.