Edited Issue: Model-binding collection fails when non-collection property shares a prefix [832]

Given a collection property named "foos" and another property named "foosBar" on an object being model-bound, because of the implementation of the PrefixContainer (specifically the IsPrefixMatch method), if "foosBar" is on a boundary checked by Array.BinarySearch, the algorithm will miss all the collection properties, and the collection will be null after model-binding completes.

I've included failing test in pull request [4032](http://aspnetwebstack.codeplex.com/SourceControl/network/forks/bmsullivan/prefixcontainertests/contribution/4032). I'm honestly not sure how to fix this without breaking something else or significantly impacting model-binding performance.