Implement support for code offloading

[huberflores]

Moving one task from one place to another at code method level.

[huberflores]

This should include D2D, remote cloud and cloudlet.

[huberflores]

Wifi implementation can be reused for both, remote cloud (Wifi) and D2D (WifiDirect). Unfortunately, this does not happen with Bluetooth as that interface uses its own BluetoothSockets, which are very different from TCP/IP sockets.

[huberflores]

Single offloading is successful, but continuous offloading is unreliable using Bluetooth as communication channel. Moreover, due to BluetoothSockets, the Class in which the method is captured also has to extend Serializable. Otherwise, the ObjectOutputStream just hangs on.