New issue templates.

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea or feature for Firefly III
+
+---
+
+**Description**
+Please describe your feature request:
+
+- I would like Firefly III to do X.
+- What if you would add Y?
+
+**Solution**
+Describe what your feature would add to Firefly III.
+
+**What are alternatives?**
+Please describe what alternatives currently exist.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.