Added ngBindOnce benchmarks on the largetable-bp

Hi @IgorMinar and @jeffbcross 
I wrote a basic benchmark to check the difference speed between the classic ngBind with the new ngBindOnce.

on my Google Chrome (Version 37.0.2062.120) I got this result after 10 loops:
1) ngBind
```shell
destroy : mean: 319.08ms ± 4%       (stddev 12.44)      (min 301.03 / max 336.42)
create :  mean: 2362.93ms ± 14%     (stddev 336.86)     (min 2029.95 / max 3132.09)
$apply :  mean: 55.68ms ± 19%       (stddev 10.57)      (min 42.35 / max 68.67)
```

1) ngBindOnce
```shell
destroy : mean: 312.34ms ± 3%       (stddev 10.58)        (min 299.78 / max 331.11)
create :  mean: 2441.22ms ± 24%     (stddev 583.30)       (min 2127.00 / max 4044.66)
$apply :  mean: 66.66ms ± 73%       (stddev 48.45)        (min 39.48 / max 200.60)
```

I stat writing this benchmark because after a first refactoring on [#ngtasty](https://github.com/Zizzamia/ng-tasty) I notice by using [Batarang](https://chrome.google.com/webstore/detail/angularjs-batarang/ighdmehidhipcmcojjgiloacoafjmpfk?hl=en) that the same binding with the new `bindOnce` was slightly slower during the first time binding.

In the end on Batarang and [Benchpress](https://github.com/angular/benchpress) looks that ngBindOnce is aroung 3% slower than the classic ngBind.

I hope my code can be useful.
Thank you :)