First stab at declarative web request API example
- Add reset button to form and blocking log beneath form
- Block using regular expression (default to blogspot and gstatic)
- Add optional configuration: resource types to block with CancelRequest +
  notification
- No more blocked.js; only redirecting (indirectly via message) on page loads
- Rename things to reflect general content blocker (not just overriding images)
- Bug fix: innerHTML, not innerHtml
Clean up look-and-feel
Check for declarative web request API; show lightbox when it is not available
Adding webview-samples/declarative-web-request README and assets; also fixed up some layout
Fix up wording in README
Remove unnecessary calls to console.log()
Generalize lightbox message for webview declarative web request API sample
Merge pull request #253 from mdittmer/declarative-web-request

<webview> example: declarative web request API