Add an Issue template to ask for more information up front.

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,37 @@
+_To assist in resolving your issue, provide as much information as possible, in place of the ellipses (`…`) below._
+
+---
+**Environment:** _Describe your Vim/NERDTree setup._
+
+>* Operating System: …
+>* Vim version `:version`: …
+>* NERDTree version `git rev-parse --short HEAD`: …
+>* NERDTree settings applied in your vimrc, if any:
+>
+>   ```
+>   …
+>   ```
+
+**Process:** _List the steps that will recreate the issue._
+
+>1. …
+
+**Current Result:** _Describe what you you currently experience from this process._
+
+>…
+
+**Expected Result:** _Describe what you would expect to have resulted from this process._
+
+>…
+
+---
+**Optional**
+
+**Screenshot(s):**
+
+>…
+
+**Possible Fix:** _(Have you poked around in the code?)_
+
+>…
+