Mobot for Android, initial commit.

The app consists of 2 activities:
 1. MainActivity
    - does the detection of wifi networks, dummy for now;
    - adds a button to switch to the second activity.
 2. JoystickActivity
    - establishes a socket connection to ip/port (hardcoded for now)
    - provides a basic joystick control which builds command-packets for each head position and sends them through the socket.