Added sample programs for Solenoids and Relays.

Added a sample program to the eclipse plugin which uses joystick buttons
in Operator Control mode in order to control the output of a single and
a double solenoid.
Also added a sample program which uses joystick buttons to control a
spike/Relay.

Bonus: The title on the window that you get when you are opening a sample in
C++ said "Java" instead of "C++". Fixed now.

Change-Id: I0d01c23003d1fba2dbb08cbe6977ec886d97a22f

eclipse-plugins/edu.wpi.first.wpilib.plugins.cpp/resources/templates/examples/Relay/src/Robot.cpp

@@ -0,0 +1,69 @@
+#include "WPILib.h"
+
+/**
+ * This is a sample program which uses joystick buttons to control a relay.
+ * A Relay (generally a spike) has two outputs, each of which can be at either
+ *   0V or 12V and so can be used for actions such as turning a motor off,
+ *   full forwards, or full reverse, and is generally used on the compressor.
+ * This program uses two buttons on a joystick and each button corresponds to
+ *   one output; pressing the button sets the output to 12V and releasing sets
+ *   it to 0V.
+ * During Operator Control, the loop waits for a brief time before continuing
+ *   in order to allow other threads to run. This is generally a good idea,
+ *   especially as joystick values are only received every 20ms.
+ */
+class Robot: public SampleRobot
+{
+	// Joystick with which to control the relay.
+	Joystick m_stick;
+
+	// Relay to use for the
+	Relay m_relay;
+
+	// Numbers of the buttons to be used for controlling the Relay.
+	const int kRelayForwardButton = 1;
+	const int kRelayReverseButton = 2;
+
+	// Update every 5milliseconds/0.005 seconds.
+	const double kUpdatePeriod = 0.005;
+
+public:
+	Robot() :
+			m_stick(0), // Use joystick on port 0.
+			m_relay(0)  // Relay on port 0.
+	{
+	}
+
+	/**
+	 * Control a Relay using Joystick buttons.
+	 */
+	void OperatorControl()
+	{
+		while (IsOperatorControl())
+		{
+			// Retrieve the button values. GetRawButton will return
+			//   true if the button is pressed and false if not.
+			bool forward = m_stick.GetRawButton(kRelayForwardButton);
+			bool reverse = m_stick.GetRawButton(kRelayReverseButton);
+
+			// Depending on the button values, we want to use one of
+			//   kOn, kOff, kForward, or kReverse.
+			// kOn sets both outputs to 12V, kOff sets both to 0V,
+			//   kForward sets forward to 12V and reverse to 0V, and
+			//   kReverse sets reverse to 12V and forward to 0V.
+			if (forward && reverse)
+				m_relay.Set(Relay::kOn);
+			else if (forward)
+				m_relay.Set(Relay::kForward);
+			else if (reverse)
+				m_relay.Set(Relay::kReverse);
+			else
+				m_relay.Set(Relay::kOff);
+
+			// Insert 5ms delay in loop.
+			Wait(kUpdatePeriod);
+		}
+	}
+};
+
+START_ROBOT_CLASS(Robot);