Create PULL_REQUEST_TEMPLATE.md

Author: chieffancypants

PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,13 @@
+#### Summary:
+
+Provide a general description of the code changes in your pull
+request. If bugs were fixed, please document the changes and why
+they were introduced.
+
+Please ensure that your PR contains test cases that cover all new
+code and any changes to existing code. Without tests, your PR is
+likely to be closed without merging.
+
+#### Related issues:
+Please review the [issues](https://github.com/chieffancypants/angular-loading-bar/issues)
+page, and link any issues that are addressed or related to this PR.