Add github issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Describe the steps to reproduce the behavior, including relevant information such as: paths to inputs, links to and/or a description of the input data, command line options (where applicable), and any relevant background information. 
+
+**Input data**
+If your input data is substantially different than our test data (https://sourceforge.net/p/teca/TECA_data) then please provide a link to a representative dataset that we can use to reproduce the issue.
+
+**Platform**
+ - HPC system name, if this is a cluster or supercomputer [e.g. Cori Cray XC40]:   
+ - Operating system name: [e.g. MacOS, Ubuntu, CentOS, etc]:
+ - Compiler and version [e.g. gcc --version]:
+ - CMake version [e.g. cmake --version]:

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.