added gitlab issue template, h/t dhaynes

.gitlab/issue_templates/default.md

+# Summary
+
+Here you should include two to three sentences explaining the thought process
+about the current issue. Maybe a picture? Some details that could best help someone,
+especially someone new, understand the goal of the issue and how they should best
+approach the problem.
+
+# Helpful Links
+
+Here you should include a bullet point list of links to documentation, stack overflow,
+whatever, that could help guide someone on what it is they are trying to do.
+Essentially, a list of links to point them in the right direction.