Create add_new_feature_option.md

.github/PULL_REQUEST_TEMPLATE/add_new_feature_option.md

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+---
+name: Add a new option or feature
+about: You want to add a new feature or option
+
+---
+
+# Description
+- [ ] Source branch in your fork has meaningful name (not `master`)
+
+
+Fixes Issue: 
+
+
+
+# Before Merge Checklist 
+These items can be completed after PR is created.
+
+(Check any items that are not applicable (NA) for this PR)
+
+- [ ] JavaScript implementation
+- [ ] Python implementation (NA if HTML beautifier)
+- [ ] Added Tests to data file(s)
+- [ ] Added command-line option(s) (NA if
+- [ ] README.md documents new feature/option(s)
+