part deux of https://github.com/fnproject/fn/issues/1067 -- I am planning to update CONTRIBUTING.md to say something along the lines of 'open an issue' to create an 'open an issue describing a problem' -> 'open a pr resolving said issue' kinda format, this is pretty standard and helps make users feel comfortable opening issues to discuss work they are planning to do rather than just going off and doing it (or being scared off). the rest of it is pretty barebones and copied from Docker mostly (I like their approach, some others are kind of intimidating, am open to ideas though). gif ideas welcome.
part 1 of #1067 - this will help users create issues with all (most of?) the context we need without having to ask. it also includes a policy to close bugs that are left stale after 7 days, which is convenient to keep issues from growing like a weed.
