new library GraphView added

Author: jjoe64

pages/Graph.md

@@ -3,6 +3,7 @@ Graph
 Name | License | Demo
 --- | --- | ---
 [EazeGraph](https://github.com/blackfizz/EazeGraph) | [Apache License V2](https://www.apache.org/licenses/LICENSE-2.0)  | <img src="/art/EazeGraph.png" width="49%"> <img src="/art/EazeGraph2.png" width="49%"> <img src="/art/EazeGraph3.png" width="49%"> <img src="/art/EazeGraph4.png" width="49%">
+[GraphView](https://github.com/jjoe64/GraphView) | [Apache License V2](https://www.apache.org/licenses/LICENSE-2.0)  | <img src="/art/graphview-zooming.gif" width="65%"> <img src="/art/graphview-anim.gif" width="65%">
 [hellocharts-android](https://github.com/lecho/hellocharts-android) | [Apache License V2](https://www.apache.org/licenses/LICENSE-2.0)  | <img src="/art/hellocharts-android.gif" width="49%"> <img src="/art/hellocharts-android2.png" width="49%"> <img src="/art/hellocharts-android3.png" width="49%">
 [MPAndroidChart](https://github.com/PhilJay/MPAndroidChart) | [Apache License V2](https://www.apache.org/licenses/LICENSE-2.0)  | <img src="/art/MPAndroidChart.png" width="49%"> <img src="/art/MPAndroidChart2.png" width="49%"> <img src="/art/MPAndroidChart3.png" width="49%"> <img src="/art/MPAndroidChart4.png" width="49%">
 [WilliamChart](https://github.com/diogobernardino/WilliamChart) | [Apache License V2](https://www.apache.org/licenses/LICENSE-2.0)  | <img src="/art/williamchart_line.png" width="65%"> <img src="/art/williamchart_bar.png" width="65%">