Renamed sharedModel module to racevisionGame - this is intended to be our single module program.

Moved Boat/MockBoat/VisualiserBoat into it.
Moved Polars, polarParser, VMG, and polar exception.
Moved the networking stuff into it.
Moved angle, azimuth, bearing into it.
Moved gpscoordinate into it.
Moved mark/compoundMark into it.
Moved leg into it.
Moved trackpoint into it.

racevisionGame/src/main/java/mock/exceptions/InvalidPolarFileException.java

@@ -0,0 +1,24 @@
+package mock.exceptions;
+
+/**
+ * An exception thrown when we cannot parse a polar data file.
+ */
+public class InvalidPolarFileException extends RuntimeException {
+
+    /**
+     * Constructs the exception with a given message.
+     * @param message Message to store.
+     */
+    public InvalidPolarFileException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructs the exception with a given message and cause.
+     * @param message Message to store.
+     * @param cause Cause to store.
+     */
+    public InvalidPolarFileException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}