Added pull request and issue templates (MHeironimus#81)

* Created initial issue template file
* Created initial pull request template

Author: MHeironimus

issue_template.md

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+## Description of Issue
+Enter description of issue here.
+
+## Technical Details
+
+- Arduino Board (e.g. Arduino Leonardo): 
+- Host OS (e.g. Windows 10):
+- Arduino IDE Version (e.g. 1.8.3):
+
+## Sketch File that Reproduces Issue
+
+~~~
+Sketch file goes here (if applicable)
+~~~
+
+## Wiring Details
+
+Any details about pin wirings that may be relevant.

pull_request_template.md

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+Fixes # or Enhancement #
+
+Changes proposed in this pull request:
+
+- 
+- 
+- 
+
+Contributors: