1) bugfix: removed windows phone silverlight from nuspec
This should have been removed in a previous commit but was missed.
2) bugfix: resolved nuget packaging defect where `reactiveui` meta package was packaging up 108mb of build artifacts.
These artifacts aren't used and should never have been distributed. As it turns out NuGet v3 needs at-least one <file/> include otherwise this happens. Was 108mb now 2.7kb.
3) refactor: changed all android projects to compile with latest SDK (always) and Android SDK installation is now handled via `appveyor.yml` instead of `bootstrap.ps1` as AppVeyor does not currently have build-tools 24 installed in their base image.
4) bugfix: resolved ci problem where builds were showing as failed when the build was actually successful.
Glenn Watson
Glenn
Geoffrey Huntley
Olly Levett
Rodney Littles II