Add: AdamBrett\Router

Hi,

I haven't had looked at the full router build benchmark yet, but I have added a serializable version of my router so that it can be fairly compared to the other routers.  It still comes out way faster than I think it should, so I have probably done something wrong!  Any guidance you can give would be great.  The figures I got are below:

This benchmark consists of 12 tests. Each test is executed 1,000 times, the results pruned, and then averaged. Values that fall outside of 3 standard deviations of the mean are discarded.


Test Name | Results | Time | + Interval | Change
--------- | ------- | ---- | ---------- | ------
AdamBrett\Router - unknown route (1000 routes) | 984 | 0.0000121007 | +0.0000000000 | baseline
AdamBrett\Router - last route (1000 routes) | 988 | 0.0000123608 | +0.0000002601 | 2% slower
FastRoute - unknown route (1000 routes) | 989 | 0.0009440708 | +0.0009319701 | 7702% slower
FastRoute - last route (1000 routes) | 999 | 0.0010252782 | +0.0010131775 | 8373% slower
Symfony2 Dumped - unknown route (1000 routes) | 1,000 | 0.0013954713 | +0.0013833706 | 11432% slower
Pux PHP - unknown route (1000 routes) | 962 | 0.0023345717 | +0.0023224710 | 19193% slower
Pux PHP - last route (1000 routes) | 999 | 0.0023385731 | +0.0023264725 | 19226% slower
Symfony2 Dumped - last route (1000 routes) | 985 | 0.0047210321 | +0.0047089314 | 38915% slower
Symfony2 - last route (1000 routes) | 999 | 0.0066727893 | +0.0066606886 | 55044% slower
Symfony2 - unknown route (1000 routes) | 998 | 0.0071185701 | +0.0071064694 | 58728% slower
Aura v2 - last route (1000 routes) | 999 | 0.0073270211 | +0.0073149204 | 60450% slower
Aura v2 - unknown route (1000 routes) | 996 | 0.0097585794 | +0.0097464788 | 80545% slower


## First route matching
This benchmark tests how quickly each router can match the first route. 1,000 routes each with 9 arguments.

This benchmark consists of 6 tests. Each test is executed 1,000 times, the results pruned, and then averaged. Values that fall outside of 3 standard deviations of the mean are discarded.


Test Name | Results | Time | + Interval | Change
--------- | ------- | ---- | ---------- | ------
AdamBrett\Router - first route | 993 | 0.0000118510 | +0.0000000000 | baseline
FastRoute - first route | 997 | 0.0000249696 | +0.0000131186 | 111% slower
Pux PHP - first route | 985 | 0.0000253540 | +0.0000135029 | 114% slower
Symfony2 Dumped - first route | 977 | 0.0000557101 | +0.0000438591 | 370% slower
Aura v2 - first route | 993 | 0.0001643055 | +0.0001524544 | 1286% slower
Symfony2 - first route | 992 | 0.0001835614 | +0.0001717104 | 1449% slower

[These](https://github.com/adambrett/php-router/commit/7d5f5ec594db1538a9e7f2d8317222381a3e264b) are the relevant changes in my router library, specifically it's the `SerializableRouter` and `RouteCollection` classes and `Route::matches` method being run in the benchmark.