Thanks to /u/DrAEnigmatic on Reddit for spotting these mistakes.
Added MIT License badge.
Changed the fury.io version badge for a shields.io packagist badge.
First time using Data Providers in PHPUnit. I like em.
Merge pull request #3 from stephen-hill/UnitTestDataProviders

Implement PHPUnit Data Providers
Added the Athletic Benchmarking Framework as a dev dependency.
Added a benchmark for the current Base58 implementation.
Added benchmarks for PHP's built-in Base64 and Base16 encoding to compare against this library.
Add benchmarking details.
Merge pull request #4 from stephen-hill/Benchmark

Added Benchmarks
Renamed.
New interface for encoding/decoding service providers.
New service for BCMath and GMP.
Modified to accept an optional service, otherwise a default is selected.
Updated to test each new service.
Updated to use the BCMath service.
New GMP service benchmark.
Checks to see if GMP is available, then check for BC Math, and finally throws an exception if either is not found.
Added Advanced Usage section
Added example benchmark output.