Add Heart Rate Service sample for bluetoothLowEnergy
Add Battery Service sample for bluetoothLowEnergy
Fixed minor style issues
Moved UI related code into its own module.
Placed the sensor code into a module
Merge pull request #267 from armansito/ble-hr-sensor

Add Heart Rate Service sample for bluetoothLowEnergy
Fixed minor style issues
Factored UI code out to its own module
Place the demo code into a module
Fix minor CSS rule
[camera-capture] Added poster image
Merge pull request #269 from armansito/ble-battery-service

Add Battery Service sample for bluetoothLowEnergy
Adding screenshots for bluetooth samples.
Add bluetooth samples metadata.
Add bluetooth and old_sockets to README auto generated table
Add Device Information Service sample for bluetoothLowEnergy
bluetooth-samples/device-info-demo: Initial style changes.

Moved the Device Information Service sample into bluetooth-samples. Made minor
style changes and moved the UI logic into its own module.
Factured the bluetooth logic into a module.
Added screenshot