Add status and image tag badges to the readme (#63)

README.md

@@ -1,4 +1,7 @@
-# africa_rangeland_watch
+![Staging Tag](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/lgkgh/889dd6c34a68d9461b1fd8cdb56b8a21/raw/arw_build_sta-tag.json)
+![Staging Status](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/lgkgh/889dd6c34a68d9461b1fd8cdb56b8a21/raw/arw_build_sta-status.json)
+
+# Africa Rangeland Watch
 Africa Rangeland Watch (ARW) was designed and developed by Conservation  International (CI) and is aimed at monitoring rangeland impact. ARW empowers  users to quantify land-use and climate impacts on rangelands over time and space,  based on remotely sensed satellite imagery supplemented by ground-based  rangeland monitoring. 
 
 **Project Development team**