fix(scrollView): start scroll again if it stops beyond boundaries

Addresses #482

Author: ajoslin

Diff for: js/views/scrollView.js

@@ -2024,17 +2024,23 @@ ionic.views.Scroll = ionic.views.View.inherit({
 
       // Slow down until slow enough, then flip back to snap position
       if (scrollOutsideX !== 0) {
-        if (scrollOutsideX * self.__decelerationVelocityX <= self.__minDecelerationScrollLeft) {
+        var isHeadingOutwardsX = scrollOutsideX * self.__decelerationVelocityX <= self.__minDecelerationScrollLeft;
+        if (isHeadingOutwardsX) {
           self.__decelerationVelocityX += scrollOutsideX * penetrationDeceleration;
-        } else {
+        }
+        //If we're not heading outwards, or if the above statement got us below minDeceleration, go back towards bounds
+        if (!isHeadingOutwardsX || self.__decelerationVelocityX <= self.__minDecelerationScrollLeft) {
           self.__decelerationVelocityX = scrollOutsideX * penetrationAcceleration;
         }
       }
 
       if (scrollOutsideY !== 0) {
-        if (scrollOutsideY * self.__decelerationVelocityY <= self.__minDecelerationScrollTop) {
+        var isHeadingOutwardsY = scrollOutsideY * self.__decelerationVelocityY <= self.__minDecelerationScrollTop;
+        if (isHeadingOutwardsY) {
           self.__decelerationVelocityY += scrollOutsideY * penetrationDeceleration;
-        } else {
+        }
+        //If we're not heading outwards, or if the above statement got us below minDeceleration, go back towards bounds
+        if (!isHeadingOutwardsY || self.__decelerationVelocityY <= self.__minDecelerationScrollTop) {
           self.__decelerationVelocityY = scrollOutsideY * penetrationAcceleration;
         }
       }