Rename StyletLogManager -> LogManager and IStyletLogger -> ILogger, but put in Logger namespace
Fix broken .csproj
Info, rather than Warn, when the ActionTarget is null
Move OnStart to before the IViewManager is resolved, so the IViewManager gets a logger
Change DebugLogger to TraceLogger, which logs even in Release builds
Start of implementing ApplicationLoader
Add unit tests for ApplicationLoader, and fix Bootstrapper tests
Fix the integration tests
Fix the samples
Merge branch 'feature/loader' into develop

* feature/loader:
  Fix the samples
  Fix the integration tests
  Add unit tests for ApplicationLoader, and fix Bootstrapper tests
  Start of implementing ApplicationLoader
Change capitalisation of ValidationModeBase.AutoValidate
Change Stringable<T> to a struct, to avoid nullity issues
Fix Stylet.Samples.RedditBrowser