Added isNormal() method to Device interface and updated tests

spring-mobile-device/src/main/java/org/springframework/mobile/device/Device.java

@@ -23,6 +23,11 @@
  * @author Scott Rossillo
  */
 public interface Device {
+
+	/**
+	 * True if this device is not a mobile or tablet device.
+	 */
+	boolean isNormal();
 
 	/**
 	 * True if this device is a mobile device such as an Apple iPhone or an Nexus One Android.

spring-mobile-device/src/main/java/org/springframework/mobile/device/DeviceType.java

@@ -27,12 +27,12 @@ public enum DeviceType {
 	NORMAL, 
 
 	/**
-	 * Represents a mobile sized device, such as an iPhone
+	 * Represents a mobile device, such as an iPhone
 	 */
 	MOBILE, 
 
 	/**
-	 * Represents a tablet sized device, such as an iPad
+	 * Represents a tablet device, such as an iPad
 	 */
 	TABLET
 }

spring-mobile-device/src/main/java/org/springframework/mobile/device/LiteDevice.java

@@ -29,15 +29,23 @@ class LiteDevice implements Device {
 	public static final LiteDevice TABLET_INSTANCE = new LiteDevice(DeviceType.TABLET);
 
 	public static final LiteDevice NORMAL_INSTANCE = new LiteDevice(DeviceType.NORMAL);
+
+	public boolean isNormal() {
+		return this.deviceType == DeviceType.NORMAL;
+	}
 
 	public boolean isMobile() {
-		return deviceType == DeviceType.MOBILE;
+		return this.deviceType == DeviceType.MOBILE;
 	}
 
 	public boolean isTablet() {
-		return deviceType == DeviceType.TABLET;
+		return this.deviceType == DeviceType.TABLET;
 	}
 
+	public DeviceType getDeviceType() {
+		return this.deviceType;
+	}
+
 	public String toString() {
 		StringBuilder builder = new StringBuilder();
 		builder.append("[LiteDevice ");