Update issue templates

Author: alshedivat

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,6 +7,11 @@ assignees: ''
 
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+**Acknowledge the following**
+- [ ] I carefully read and followed the [Getting Started](https://github.com/alshedivat/al-folio#getting-started) guide.
+- [ ] I read through [FAQ](https://github.com/alshedivat/al-folio#faq) and searched through the [past issues](https://github.com/alshedivat/al-folio/issues), none of which addressed my issue.
+- [ ] The issue I am raising is a potential bug in al-folio and not just a usage question. <br> [For usage questions, please use [gitter chat](https://gitter.im/alshedivat/al-folio) instead of raising an issue.]
+
 **Describe the bug**
 A clear and concise description of what the bug is.