Added Issue Template

Based on the example at https://github.com/stevemao/github-issue-templates/tree/master/checklist2

docs/ISSUE_TEMPLATE.md

@@ -0,0 +1,54 @@
+<!---
+
+    If a section does not apply, you are free to remove it.
+    
+    For example, when you select "Not an issue", you can remove all sections apart
+    from the "Issue type" section
+
+-->
+
+### Issue type
+
+* [ ] Bug Report
+* [ ] Feature Request
+* [ ] Question
+* [ ] Not an issue
+
+### Prerequisites
+
+* [ ] Can you reproduce the issue?
+* [ ] Is this an urgent issue?
+* [ ] Did you search the repository issues?
+* [ ] Did you check the forums?
+* [ ] Did you perform a web search (google, yahoo, etc)?
+
+For more information, see the **CONTRIBUTING** document.
+
+### Description
+
+[Description of the bug or feature]
+
+### Steps to Reproduce
+
+1. [First Step]
+2. [Second Step]
+3. [and so on...]
+
+**Example code:**
+
+```
+    An example of code related to this issue
+```
+
+**Expected behavior:** [What you expected to happen]
+
+**Actual behavior:** [What actually happened]
+
+### System
+
+**PEG.js:** ...
+<br>**Node.js:** ...
+<br>**NPM:** ...
+<br>**Browser:** ... 
+<br>**OS:**  ...
+<br>**Editor:** ...