PR and Issue templates

[yardasol]

This PR adds PR and Issue templates to the repo. They are similar to the ones i made for SaltProc but with some better formatting.

closes #130

[yardasol]

@katyhuff @smpark7 bump

[smpark7]

(Meta question) Do we want the templates to be strictly followed or to be general guidelines? I recognize the benefits of standardization since we welcome outside contributors, but I find the headers in the issue templates to be quite restrictive. I would prefer to have the Expected behavior, Describe the bug, and To reproduce headers be guidelines instead under one big section named Description.

As for the PR template, I think the checklist is good for reminding contributors (and ourselves) of our expectations.

[yardasol]

@smpark7 great suggestions. Could you go ahead and suggest those changes so you can get commit credit for them?

[katyhuff]

This looks like a good addition. I have no problem with them as written. I see @smpark7 has made a suggestion and @yardasol has suggested that @smpark7 implement those suggested changes. For expediency, I recommend either the original PR author @yardasol incorporate those recommendations OR merging as is and allowing @smpark7 to make a separate PR with those changes sometime later.

[katyhuff]

@yardasol @smpark7 Can you take a quick look at my final comment and decide what to do with this PR?

[smpark7]

I'm okay with merging as is and refining the template later.

[katyhuff]

Thank you. Merged.