Enabled NuGet package restore.
Restored packages. Added Microsoft.Bcl.Async as dependency.
Added NuGet dependency on Microsoft.Bcl.Async in BattlelogMobile.Client.
Replace APM method calls with async/await-based versions.
Replaced two APM instances with async/await-based code.
Removed unnecessary NuGet files.
Merge pull request #19 from dlhartveld/replace-apm-with-aa

Replace APM-based code with equivalent async/await-based code