Fix jakob-grabner#12: Show text in spinning mode.

Fix jakob-grabner#11 text color white (which is -1) was treated as "no color" constant. Use setAutoTextColor(boolean) not to define auto color behaviour.
Added: Custom start angle, use setStartAngle(int)
Added: Annotations for value ranges.

CircleProgressView/build.gradle

@@ -26,6 +26,7 @@ android {
 }
 
 dependencies {
+    compile 'com.android.support:support-annotations:22.2.0'
 }
 
 // build a jar with source files

CircleProgressView/src/main/java/at/grabner/circleprogress/AnimationMsg.java

@@ -0,0 +1,11 @@
+package at.grabner.circleprogress;
+
+enum AnimationMsg {
+
+   START_SPINNING,
+   STOP_SPINNING,
+   SET_VALUE,
+   SET_VALUE_ANIMATED,
+   TICK
+
+}

CircleProgressView/src/main/java/at/grabner/circleprogress/AnimationState.java

@@ -0,0 +1,11 @@
+package at.grabner.circleprogress;
+
+public enum AnimationState {
+
+    IDLE,
+    SPINNING,
+    END_SPINNING,
+    END_SPINNING_START_ANIMATING,
+    START_ANIMATING_AFTER_SPINNING, ANIMATING
+
+}

CircleProgressView/src/main/java/at/grabner/circleprogress/AnimationStateChangedListener.java

@@ -0,0 +1,11 @@
+package at.grabner.circleprogress;
+
+public interface AnimationStateChangedListener{
+
+    /**
+     * Call if animation state changes.
+     * This code runs in the animation loop, so keep your code short!
+     * @param _animationState
+     */
+    void onAnimationStateChanged(AnimationState _animationState);
+}