Create Feature_request.md

Author: petecooper

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -0,0 +1,13 @@
+---
+name: Feature request
+about: Suggest an idea for Textpattern's default theme.
+
+---
+
+### Is your feature request related to a problem?
+
+{Please write here}
+
+### What is the feature?
+
+{Please write here}