Add an epic issue type

.github/ISSUE_TEMPLATE/epic.md

@@ -0,0 +1,28 @@
+---
+name: Feature Epic
+about: Propose a change that is larger than a single task
+labels: 'epic'
+
+---
+
+# Design Proposal
+
+Link to the [proposal](design/template.md)
+
+# Definition of done
+
+Describe what specific goals can measure if this overall task is considered completed. Things to consider are documentation, high level description of the feature working, and tests.
+
+* []
+
+# Subtasks
+
+Create a list of the smaller tasks to implement this design. Task can start as simple descriptions but should be converted to issues before work is started.
+
+## Started
+
+* []
+
+## Planned
+
+* []