Add issue templates

Fixes https://github.com/TinyWebEx/common/issues/9

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,33 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+## Bug description
+
+## Steps to reproduce
+
+Steps to reproduce the behavior:
+
+1. 
+2. 
+3. 
+
+**Actual behavior:**
+<!-- The behavior you saw. -->
+
+**Expected behavior:**
+<!-- A clear and concise description of what you expected to happen. -->
+
+**Screenshots**
+<!-- If applicable, add screenshots to help explain your problem. -->
+
+## System
+
+Operation system and version: 
+Browser and version: Firefox 
+Add-on version:

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,23 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+## Background
+<!-- Is your feature request related to a problem? Please describe. -->
+<!-- A clear and concise description of what the problem is. E.g.: "I'm always frustrated when […]" -->
+
+## Proposed solution
+<!-- Describe the solution you'd like -->
+<!-- A clear and concise description of what you want to happen. -->
+
+## Alternatives
+<!-- 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. -->