Adding first draft of user agent override example
Fix up user-agent sample README.md with correct screenshot link and simpler language to describe navigation.
Fix more typos in README.md
Fix more typos in README.md
Fix more typos in README.md
Put webviews in separate partitions for better performance
Update readme
Remove window bounds specification (API is in transition right now)
Move user-agent sample into webview-samples and update its readme
Merge pull request #242 from mdittmer/user-agent

<webview> set user agent example