Add Peripheral Commands

[jscrump59]

I think that I can add the Cordova callback implementation for the peripheral commands in Bluetooth.java. I would also like to add a soft fail for commands that are unsupported on a particular platform; that is examine the result code, return true on success, return false on failure making the error response available for inspection, and throw an exception where required. Mr. Almog suggested that I file and issue and open a pull request. I new at this and I would like to contribute these suggested changes.
Best regards,
Jeff Crump

[chen-fishbein]

thanks for the willing to contribute, just fork and create a pull request and I'll review it and merge it if it's ok

[jscrump59]

I pulled the latest version and added a BluetoothEx which extends Bluetooth by adding the all of the peripheral commands. To make it extendable I changed Bluetooth to protected Cordova plugin;
I replaced the BTDemo with a fuller implementation of the Central and Peripheral life cycles. It demonstrates handling the responses from callbacks. It does report that the "services" is unsupported on my devices. Please let me know what I need to do to submit them.
BTDemo.txt
BluetoothEx.txt