Version 2.0.2 Beta 2

* Upgraded solution / project files to Visual Studio 2013 Update 2
* Upgraded Caliburn.Micro 1.4 to Caliburn.Micro.Core 2.0.0-beta2
* Converted Caliburn.Micro.Logging to a portable class library (.NET4.5,
Win8, WPA8.1 WPSL8)
* Dropped support for TraceLogger since it is not supported in a PCL
* Dropped SilverLight 4/5 and Windows Phone 7.1 support
* Added a key for strong name support for all assemblies
* Added support for Symbols
* Upgraded NLog to 2.1.0
* Upgraded log4net to 1.2.13.0