bluetooth-samples_battery-service: Able to connect devices inside the App
bluetooth-samples_battery-service: Add bluetooth discovery toggle
bluetooth-samples_heart-rate-sensor: Add bluetooth discovery toggle
bluetooth-samples_device-info: Add bluetooth discovery toggle
bluetooth-samples: simplify discovery callback handler
Removed unmanaged in-app-purchases sample apps (x2). Added managed-in-app-purchases sample app. Updated README.
Fixed README link to in-app-payments feature.
Merge pull request #339 from jakeleichtling/master

Remove unmanaged IAP samples and add managed IAP sample app
Fix link to managed in-app payments API.

The Markdown URL syntax was flipped.
Merge pull request #337 from oahziur/ble

Add discovery toggle button and connect devices in apps for bluetooth-samples
Added missing samples in README
Added platform-title screenshot asset
Merge branch 'master' of https://github.com/GoogleChrome/chrome-app-samples