Add issue templates and pull request template (#142)

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,23 @@
+---
+name: Feature request
+about: Suggest an improvement or now feature
+title: ''
+labels: ''
+assignees: ''
+---
+
+**Context**
+
+<!--Please describe a proper context-->
+
+**Suggested solution**
+
+<!--Tell us what you would suggest-->
+
+**Considered alternatives**
+
+<!--Please add any alternative solutions that you have considered-->
+
+**Additional details**
+
+<!--Please add context, links, reasons, screenshots, etc.-->