Emphasizing the Issue and PR process

Applies to #60 and #167

@sizzlemctwizzle
Would you please skim over these additions and see if I missed anything or want something changed? I do have some grammar issues which are good to correct for translators... and I'll get to that in a bit.

I also have no idea what the `upstream` label means which is blocking the PR READY label for this... what is it?
> probably needs to be trimmed down some.

If it's okay with you I like it expanded... we can always condense later. I'd rather have everyone understand this concept than worry about how small a .md is on GH that is only currently referenced on GH.