Added Issue Templates

.github/ISSUE_TEMPLATE/00-bug-performance-issue.md

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+---
+name: Bug/Performance Issue
+about: Use this template for reporting a bug or a performance issue.
+
+---
+
+<em>Please make sure that this is a bug. We only address code/doc bugs, performance issues, feature requests and build/installation issues on GitHub.</em>
+
+**System information**
+- Have I written custom code (as opposed to using a stock example script provided in SwiftPlot):
+- OS Platform and Distribution (e.g., Linux Ubuntu 18.04):
+- Swift version:
+
+
+**Describe the current behavior**
+
+**Describe the expected behavior**
+
+**Code to reproduce the issue**
+Provide a reproducible test case that is the bare minimum necessary to generate the problem.
+
+**Other info / logs**
+Include any logs or source code that would be helpful to diagnose the problem. If including tracebacks, please include the full traceback. Large logs and files should be attached.

.github/ISSUE_TEMPLATE/10-build-installation-issue.md

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+---
+name: Build/Installation Issue
+about: Use this template for reporting a build or a installation issue.
+
+---
+
+<em>Please make sure that this is a build/installation issue. We only address code/doc bugs, performance issues, feature requests and build/installation issues on GitHub.</em>
+
+**System information**
+- Have I written custom code (as opposed to using a stock example script provided in SwiftPlot):
+- OS Platform and Distribution (e.g., Linux Ubuntu 18.04):
+- Swift version:
+
+
+**Describe the problem**
+
+**Provide the exact sequence of commands / steps that you executed before running into the problem**
+
+
+**Any other info / logs**
+Include any logs or source code that would be helpful to diagnose the problem. If including tracebacks, please include the full traceback. Large logs and files should be attached.

.github/ISSUE_TEMPLATE/20-documentation-issue.md

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+---
+name: Documentation Issue
+about: Use this template for documentation related
+
+---
+
+<em>Please make sure that this is a documentation issue. We only address code/doc bugs, performance issues, feature requests and build/installation issues on GitHub.</em>
+
+**System information**
+- Have I written custom code (as opposed to using a stock example script provided in SwiftPlot):
+- OS Platform and Distribution (e.g., Linux Ubuntu 18.04):
+- Swift version:
+
+
+## Description of issue (what needs changing):
+
+### Clear description
+
+For example, why should someone use this method? How is it useful?
+
+### Correct links
+
+Is the link to the source code correct?
+
+### Parameters defined
+
+Are all parameters defined and formatted correctly?
+
+### Returns defined
+
+Are return values defined?
+
+### Raises listed and defined
+
+Are the errors defined? 
+
+### Usage example
+
+Is there a usage example?
+
+
+### Request visuals, if applicable
+
+Are there currently visuals? If not, will it clarify the content?
+
+### Submit a pull request?
+
+Are you planning to also submit a pull request to fix the issue? 

.github/ISSUE_TEMPLATE/30-feature-request.md

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+---
+name: Feature Request
+about: Use this template for raising a feature request
+
+---
+
+<em>Please make sure that this is a feature request. We only address code/doc bugs, performance issues, feature requests and build/installation issues on GitHub.</em>
+
+**Basic Information**
+- Are you willing to contribute it (Yes/No):
+
+
+**Describe the feature and the current behavior/state.**
+
+**Who will benefit with this feature?**
+
+**Any Other info.**