Azure now creates default id as type string

Our model must match this change, schema generation will fail if default
type does not match the model.
Merge branch 'master' of https://github.com/winappkits/XPlatformCloudKit
Update pptx

Add Instructions on removing extraneous columns now added by default,
see:
http://blogs.msdn.com/b/carlosfigueira/archive/2013/11/23/new-tables-in-azure-mobile-services-string-id-system-properties-and-optimistic-concurrency.aspx
Add Opacity to WallPaper Background

Due to ability of user to set Light / Dark theme on Windows Phone, text
may not be visible unless opacity is applied.
Allow title text to wrap
updated ignore for .DotSettings