Create PULL_REQUEST_TEMPLATE.md

PULL_REQUEST_TEMPLATE.md

+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Describe the bug**
+A clear and concise description of the bug.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Drone switched on '...'
+2. Uploaded mission '....' (attach QGC mission file)
+3. Took off '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Log Files and Screenshots**
+*Always* add screenshots and the QGC console log.
+
+**Drone (please complete the following information):**
+- Describe the type of drone.
+- Photo of the IMU / autopilot setup if possible.
+
+**Additional context**
+Add any other context about the problem here.