Update issue templates

Create `bug report` and `feature request` templates.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,23 @@
+---
+name: Feature request
+about: You want to suggest a new feature? Use this template.
+
+---
+
+### Summary
+<!--- Short summary of your proposed feature -->
+
+
+### Description
+<!--- Describe your solution, what problem does it fix? -->
+
+
+### Alternatives
+<!--- Are there any alternatives you've considered? -->
+
+
+### Additional Information
+<!--- For Example:
+   A link to a project where the issue is relevant.
+   A link to a related issue or discussion.
+   -->