Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,12 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+Just a few points to consider before submitting a bug report:
+
+  * Do a quick search for any existing issues describing your bug
+  * Give a clear and concise description of what the bug is
+  * Include the contents of your `./debug.log` generated with `browsh --debug`
+  * Include your OS and terminal name