Add ISSUE template, add donate button

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,10 @@
+#### Expected Behviour
+
+#### Actual Behaviour
+
+#### Steps to Reproduce:
+* 
+
+NOTE: Add a GIF/Screenshot if required.
+
+Frappé Charts version: 

README.md

@@ -25,6 +25,9 @@
     <a href="https://saythanks.io/to/frappe">
         <img src="https://img.shields.io/badge/Say%20Thanks-🦉-1EAEDB.svg?style=flat-square">
     </a>
+    <a href="https://www.paypal.me/ERPNext">
+        <img src="https://img.shields.io/badge/donate-💵-f44336.svg?style=flat-square">
+    </a>
 </p>
 
 <p align="center">