Create issue templates, pull-requests and issue tags

[e-lo]

Templates are helpful for helping organize development from many parties and providing consistent, comprehensive documentation about why, how, etc.

Here is a collection of many to start from: https://github.com/stevemao/github-issue-templates

I (@e-lo ) am happy to implement if given go-ahead by community.

[e-lo]

cc: @joecastiglione on if community would like me to implement.