Create BUG_REPORT.md

ISSUE_TEMPLATE/BUG_REPORT.md

+---
+name: Bug report
+about: Something is crashing or not working as intended
+
+---
+
+## Environment
+
+**App version:**  <!-- Add branch if necessary -->  
+**Android version:**  <!-- If customize ROM, write which -->  
+**Device information:**  <!-- Manufacturer and model -->  
+
+## Description
+
+**Expected behavior:** 
+
+**Current behavior:** 
+
+## Steps to reproduce
+
+1. This
+2. Than that
+3. Then
+
+## Images <!-- if available, else delete -->  
+
+## Stacktrace/Logcat <!-- if available, else delete -->