Add contribution context and template (#71)

.github/pull_request_template.md

@@ -0,0 +1,15 @@
+<!---
+Thank you for your pull request.
+Please fill out the fields below and check that
+your contribution adheres to our guidelines.
+-->
+
+#### New App Submission
+
+- [ ] I've read the [contribution guidelines](https://github.com/awesome-lists/awesome-bash/blob/master/contributing.md).
+
+**Repo or homepage link:**
+
+**Description:**
+
+**Why I think it's awesome:**