Add issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Description**
+A clear and concise description of the bug.
+
+**Steps To Reproduce**
+Stack Overflow provides an excellent guide on [how to create a Minimal, Complete and Verifiable example.](https://stackoverflow.com/help/mcve)
+
+**Expected Behavior**
+A clear and concise description of what you expected to happen.
+
+**Environment**
+ - OS: [e.g., Ubuntu 16.04.4 LTS]
+ - Python version: [e.g., 3.7.0]
+
+**Additional Context**
+Add any other background information about the problem.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+**Application**
+What need does this feature fulfill? If your feature relates to a problem, please provide
+a clear and concise description of that problem; e.g., I'm always frustrated when [...].
+If it relates to a class of real-world problems, please provide an example.
+
+**Proposed Solution**
+A clear and concise description of what the software should do.
+
+**Alternatives Considered**
+Description of any alternative solutions or features you considered.
+
+**Additional Context**
+Add any other background information here.