added user story, issue and pull request templates (#75)

.github/issue.md

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+This is an issue!
+
+1. Please use the following format for the title:
+
+<Title of User Story>: <Title of Issue>
+
+2. Please fill out this description with the following:
+
+- Relates to <user story #>
+- Any additional information you feel is necessary.
+- Screenshots/gifs/videos/diagrams/other visual aids.
+
+3. Remember to:
+
+- Add assignees, labels and projects in the menu at the bottom or to the right of the screen.

.github/pull_request.md

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+This is a pull request!
+
+1. Please use the following format for the title:
+
+
< repo > _ < sprint > _ < issue > _ < pr or issue name >
+
+2. Please fill out this description with the following:
+
+- Resolves <issue #>
+- Description of what this pull request is for.
+- Additional information to help others that are testing.
+- Screenshots/gifs/videos/diagrams/other visual aids.
+
+3. Remember to:
+
+- Add reviewers, assignees and labels in the menu on the right. --->
+- Enable auto-merge (squash) at the bottom of the page. 

.github/user_story.md

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+This is a user story!
+
+1. Please use the following format for the title:
+
+USER STORY: <Title of User Story>
+
+2. Please fill out this description with the following:
+
+- As a < role >, I will want to < task >.
+- A list of issues.
+- Any additional information you feel is necessary.
+- Screenshots/gifs/videos/diagrams/other visual aids.
+
+3. Remember to:
+
+- Add assignees, labels and projects in the menu at the bottom or to the right of the screen.