Added guide "Interfacing with Bluetooth Devices"
Updated guide "Interfacing with Bluetooth Devices"
Add first draft of "building a native extension"
Merge pull request #36 from javiermolina1234/interfacing_with_bluetooth_devices

Add "Interfacing with bluetooth devices"
updated api ref
Update "Native extensions" guide
Remove unncecessary markup
removed old native extensions
Merge pull request #37 from javiermolina1234/native_extensions

Native extensions
updated extension guides