Remove old reference to ReactiveUI.Routing.

Remove unnecessary app.config.
Remove duplicate usings.
Fix references to ReactiveUI in Akavache.WP8.
Remove unused bcl assemblies and references to it.
Improve MakeRelease to work on Windows 8.1 and cause less errors.
Merge pull request #80 from jlaanstra/master-v3

Project files fixes, reference improvements and more small fixes.