Created PULL_REQUEST_TEMPLATE.md (keon#311)

* Create PULL_REQUEST_TEMPLATE.md

* review change

Author: goswami-rahul

PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,13 @@
+(Put an `X` inside the `[ ]` to denote check mark `[X]`.)
+
+
+- [ ] **If creating a new file :**
+  - [ ] added links to it in the README files ?
+  - [ ] included tests with it ?
+  - [ ] added description (overview of algorithm, time and space compleixty, and possible edge case) in docstrings ?
+
+- [ ] **if done some changes :**
+  - [ ] wrote short description in the PR explaining what the changes do ?
+  - [ ] Fixes #[issue number] if related to any issue
+
+- [ ] **other**