Add issue template metadata

Author: bbatsov

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,3 +1,8 @@
+---
+name: Bug Report
+about: Report an issue with CIDER you've discovered.
+---
+
 *Use the template below when reporting bugs. Please, make sure that
 you're running the latest stable CIDER and that the problem you're reporting
 hasn't been reported (and potentially fixed) already.*

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,3 +1,20 @@
-## Proposed feature/enhancement
+---
+name: Feature Request
+about: Suggest new CIDER features or improvements to existing features.
+---
 
-## Rationale
+**Is your feature request related to a problem? Please describe.**
+
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+
+Add any other context or screenshots about the feature request here.