Win8 get properties

:warning: don't merge yet :warning: 

PR for #46 

* added failing test
* added fix for `ReflectionUtils.GetProperties` so it includes properties from base class.
* ignoring path for `ReflectionUtils.GetFields`


Before this can be merged:
* separate PR must be sent to reflection-utils
* make sure all facebook-c#-sdk tests passes
* make sure all octokit.net tests passes
* need to test with lower version of .NET Framework in PCL

`GetRuntimeProperties` is documented in msdn at http://msdn.microsoft.com/en-us/library/system.reflection.runtimereflectionextensions.getruntimeproperties(v=vs.110).aspx

.NET Framework
Supported in: 4.5.1, 4.5

.NET for Windows Store apps
Supported in: Windows 8