Fixed #9 - Automatically update the Camels when Slider changes

TGPControls/TGPCamelLabels7.m

@@ -294,8 +294,13 @@
 
 #pragma mark - TGPControlsTicksProtocol
 
--(void)tgpTicksDistanceChanged:(CGFloat)ticksDistance sender:(id)sender
+- (void)tgpTicksDistanceChanged:(CGFloat)ticksDistance sender:(id)sender
 {
     self.ticksDistance = ticksDistance;
 }
+
+- (void)tgpValueChanged:(unsigned int)value
+{
+    self.value = value;
+}
 @end

TGPControls/TGPControlsTicksProtocol.h

@@ -29,6 +29,10 @@
 //    THE SOFTWARE.
 
 @protocol TGPControlsTicksProtocol<NSObject>
+
 @required
--(void)tgpTicksDistanceChanged:(CGFloat)ticksDistance sender:(id)sender;
+- (void)tgpTicksDistanceChanged:(CGFloat)ticksDistance sender:(id)sender;
+
+@optional
+- (void)tgpValueChanged:(unsigned int)value;
 @end

TGPControls/TGPDiscreteSlider7.m

@@ -180,6 +180,11 @@ static CGSize iosThumbShadowOffset = (CGSize){0, 3};
 }
 
 - (void)sendActionsForControlEvents {
+    // Automatic UIControlEventValueChanged notification
+    if([self.ticksListener respondsToSelector:@selector(tgpValueChanged:)]) {
+        [self.ticksListener tgpValueChanged:self.value];
+    }
+
     //  Interface builder hides the IBInspectable for UIControl
 #if !TARGET_INTERFACE_BUILDER
     [self sendActionsForControlEvents:UIControlEventValueChanged];
@@ -457,8 +462,6 @@ static CGSize iosThumbShadowOffset = (CGSize){0, 3};
 - (CGSize)thumbSizeIncludingShadow {
     switch (self.thumbStyle) {
         case ComponentStyleInvisible:
-            return CGSizeZero;
-
         case ComponentStyleRectangular:
         case ComponentStyleRounded:
             return ((self.thumbShadowRadius != 0.0)